The Largest Cave In The USA Will Blow Your Mind

We journeyed into the cave with the largest underground room in the USA. It wasn't easy but it was so worth it seeing this place.
Our friends channels are ‪@Mineral_dude‬ ‪@LowRangeOutdoors‬ ‪@CantrellCaving‬ ‪@Underground_Adventures‬

[@Underground_Adventures]

It is so loud in the creek...... And Me and Alex went on a long journey to somewhere and never found a dead end.... We just finally decided to turn around and come back.

[@dalton1583]

Long way left.

[@CantrellCaving]

@@dalton1583correct!

[@ActionAdventureTwins]

Dude it's crazy how it is in these caves we were getting very worried about yall..We weren't sure what to do wait for yall or complete the mission! Definitely glad we continued on to the large room considering that you guys were all good In the end!!!

[@ghoststardancer5030]

If you kept going along through that cave it could possibly have at least one other exit/entry point that could be accessed from above ground. That was amazing when one of the guys said “it looks like Saturn “ Makes you think that we’re not much different here in and on this planet as the planets are in the universe. Thanks for the unload. 😊

[@Underground_Adventures]

@@ActionAdventureTwins ya... continue the mission. We pushed that passage we went down for ever. I think it might go out past the repel.

[@BaronVonBeef]

Caves like this really make me wonder about the ones that are yet to be discovered

[@jarodp1027]

The imagination runs wild there for sure

[@Tootnscoot]

I'm from Tennessee near Kentucky and nearly every property has some form of cave under it. It's like a giant sponge under our feet and most people are unaware. But for brain exercise think of this, scientists recently discovered proof of an ocean in/near the mantle of the earth that has more water than all the surface on earth. It is truly amazing what's under our feet and most of it will never be explored. There could theoretically be dwarf blind elephants or even super sized insects underground. We simply don't know. Recently in Tennessee an entirely new plant species was discovered on a random hill by some students. We know about 20% tops of the living species on the surface of our planet. The ocean we've only ever explored around 10% of.

[@DannyMancheno]

MAN, there could be a stadium sized room, a mile below the ocean floor all we know.

[@aaroncapricorn5867]

like the ones the government seals up? ive seen on i think on a yt video. the think was sealed off with concrete with 2 holes(not big enough for any human to pass through), one for air flow, one for escape(someone inside needs to leave i guess?)(but you cant push it inward)

[@Tootnscoot]

@DannyMancheno sounds like a Hollywood apocalypse movie idea to me. We need a team and only a few men have the abilities we need...Vin Diesel, Morgan Freeman, The Rock and Kevin Hart. Make Will Ferrel play a serious role as like the President just to throw everyone off lol

[@jackieeastom8758]

At 64 y’all make me miss my youth! Thank you for sharing this! Enjoy life to its fullest and keep practicing your safety!

[@StormyLynn724]

63 piping in here. Omg I was practically hyperventilating watching this. I know what I can do and now I know what I can’t. Lol. I feel like this is “anything can go wrong” land. 😮 🙏praying you guys always stay safe and be smart. 👍

[@bertkilborne6464]

Makes me wonder about whether flash floods ever happen there

[@paulvamos7319]

53 and way too out of shape to do anything these fellas get up to! 😂

[@taitsmith8521]

It's part of the Mammoth cave system in Kentucky. There are plenty of guided tours. There is also Carlsbad caverns in New Mexico which is completely tourist friendly.

[@ElissaBlankenship.]

Viewers take note. The current pulling someone in the water as they swim is an undercurrent. Still water can be deceiving and dangerous.

[@Lina-ws3by]

that wasn't still water, it was moving fast.

[@kspen6110]

The views of them repelling down in the big light really shows how massive the room is. Absolutely incredible. Thanks for sharing.

[@mushsqush7731]

When I see massive underground water systems I think unknown things are going to come up and eat me. I have always been in love with the feel of a cave and all of its mysteries. Now I can explore without leaving my house 😂 thanks guys for such wholesome content

[@qwerty4134]

def more that havnt been found than found

[@ThinkFreely2012]

​@@qwerty4134I'm sure there are many that haven't been found. But there are more than 7000 known caves in Texas alone. Just very few are open to the public.

[@tjpprojects7192]

I'd be more scared of the cave flash flooding somehow, especially because of the rain.

[@PeaceMeBish]

Just remember…nothing grows to a massive size without sunlight. 😉

[@Sj-yf2jg]

​@@PeaceMeBish have seen the movie "The Cave" 😂

[@alexanderpinkerton3452]

You guys should start carrying laser pointers with you for scouting out long linear spaces. Probably would work better than a flashlight for things like that water tunnel after the swim. Once the laser hits a wall, the light will bounce and light up the surrounding space as well.

[@onalennasehume4586]

Brilliant idea

[@blueringoffire]

u can buy pretty cheap laser liners that used in construction mainly framing and sheetrock that form a diameter then will read the measurements of distance and tell u the dimensions of the room you are in!!! PERFECT IDEA DUDE

[@vermiculus3848]

Underrated comment and a great idea that would just be fun to see someone use

[@Akavir7]

​@@blueringoffiremost cave surveys already use either a distoX or a BRIC survey laser.

[@yeetgrenade7492]

They might also want to bring some flares and a pickaxe...

[@germanjohn5626]

I used to go caving when I was younger 60 years ago, we had food, extra thermal underwear and a wool blanket with us and used to stay the night over. There is nothing darker and more peaceful than spending a night in a place that was hundreds of feet below the surface and a mile + away from the entrance.

[@smallengine]

That’s awesome

[@planescaped]

And then you get woken up in the middle of the night by a thump...

[@ElleryOmur]

According to Wikipedia, Carlsbad Cavern includes a large limestone chamber, named simply the Big Room, which is almost 4,000 ft (1,220 m) long, 625 ft (191 m) wide, and 255 ft (78 m) high at its highest point. The Big Room is the largest chamber in North America and the 32nd largest in the world.

[@midnightchannel7759]

Yeah, I was thinking about that too. Ive been there...

[@danielcarmonaful]

The fact that you put the measurement in meters helped the rest of the world a lot

[@TurpInTexas]

Yeah, I figured when they posted this as the largest, the evidently haven't been to Carlsbad, its as big as 14 football fields, no comparison.

[@westtexastumbleweed8360]

Largest public one. There’s a lot of unexplored caves here in Texas on private property 😊

[@blackhawkrescuemissiongame8461]

@@danielcarmonafulhe copied it from Wikipedia

[@G1806]

Hey lads I’ve done some real minimal caving in Lancashire,England I was in the army and it was an easy cave,nothing like what you lads are doing. I have had to go up through a waterfall as part of an outdoor climb. I climbed around 3/4 meters up and through a waterfall it’s an intense experience,I think I didn’t feel fully in control was the fear I guess feeling got to me,so underground sending props from Aberdeen,Scotland 🏴󠁧󠁢󠁳󠁣󠁴󠁿🇺🇸

[@BenMJay]

you are all a billion times more adventurous than me. I would never do anything like this.

[@rbryant100]

These are some of the best caving videos on YT. Never was into vertical stuff, but did quite a bit of crawling and squeezing in tight spots. I’m 51 and my night vision has degraded to the point that it’s no longer safe for me to be underground. Thanks for taking me and others along on your adventures

[@shack12319]

Dude that was scary watching you get in that murky water, you had no idea what kinda potential underwater currents were in that water that possibility could have easily pulled you under, be careful with deep water like that please

[@TheMeefmaster]

😂

[@floatinsun]

Exactly

[@bruceholroyd7063]

MASSIVE and SPECTACULAR experience! That would be terrifying beyond belief! You guys certainly bring the amazing, hidden wonders of this world to life! At times, it's kind of difficult to imagine the scale of these secret places until you add the human element into your camera shots! What I wouldn't give to be young enough to share in the subterranean dreams that you guys call reality! Not even Jules Verne could have imagined adventures as incredible as the ones brought to the surface by your teams! Thank You for another unforgettable journey down into the darkness!!!!

[@chrisjones5482]

Good lighting, camera quality, and shots as always make you the best caving channel on YT. I also like the clean commentary so my kid can watch it too. thanks guys and be safe!

[@MissMala]

Yes! I absolutely agree!

[@danaharris5357]

I agree! Watching with my 80ish year old parents is a lot more enjoyable without constant f bombs

[@matthewscholle4149]

Same. Thank you!

[@socomxx]

Great video man, I love how you go the extra mile , even though when things look creepy, just kept pushing. Hopefully ya'll get sponsored or something so you can travel the world exploring caves.

[@ThatOpalGuy]

might fine darwin in one of those tunnels though.

[@anthonyrussell1129]

I always love that idea of from a tiny hole in the ground you can come to these wide open spaces. Who's to say there aren't other massive undiscovered caverns here in the US

[@Nomadcreations]

& That No One Knows about Until being Discovered Notated for future Reference purposes

[@B.207.hope.8]

Seismic data and ground penetrating radar say there absolutely are. Some like size of Rhode Island,

[@Nomadcreations]

After "Seeing" The size of these randomly Where-Ever Underground "Hollows", Its easier to understand how Alleged Underground Civilizations May Be Out there, Down there...............

[@anthonyrussell1129]

@Nomadcreations Well it's hard to believe because how would they sustain themselves down there? You need light and to get light you need things from the surface. Also food and water are essentials, and clothes how would they get the material for that? Now if you mean in the supernatural sense that is easier to understand.

[@maolcogi]

@@anthonyrussell1129 Life doesn't need light, light doesn't need clothing, and food exists wherever life exists (we eat living things), also there's obviously water as that is how most caves are formed. Not let me paint a picture for you to boost your imagination on the subject. A planet could exist out in space that has no star, it's just a rogue planet, but it has a sister planet and they both orbit each other. Two celestial bodies that close would cause tidal stress and possibly volcanic activity. What if these planets were covered with water but the surface was frozen (no star to heat it) but the water under the ice was warm from the volcanic activity. Organic molecules could be brought into that sea by thermal vents and life could exist. Crazy huh?

[@Cduff420]

I don’t think I really appreciated the size of this room until the clip of your Buddy rappelling down, absolutely cathedral sized room in such an unsuspecting cave!

[@MissMala]

Or when he took the picture and you could see how small the other guy was that was holding the light!

[@christophermccall4299]

You are living the dream. It’s amazing to see these caves that most people will never see. I hope you will travel outside America would love to see what else is out there

[@EstamosDe]

Just wait a couple of years, this kind of videos will start in all over the world soon

[@keithhansen8686]

Awesome!!! Thanks for sharing this adventure.

[@SandeepDevgn]

Awesome ❤thanks sharing this adventure

[@markgibsons_SWpottery]

I have been in one cave note worthy and it was nowhere near this large!!!

[@jrsoper6524]

These are the best videos on KZbin, nobody can match these. You guys are crazy cool , super brave. Thanks so much for these incredible adventures ❤️.

[@J-GIB]

You guys are incredible! You deserve so many more subs. Thanks for sharing these amazing places that so few people will ever see.

[@electricalife]

Amazing, what else can you say. You guys are living a great life. This is the type of content KZbin was made for.

[@CryptoShaped]

Crazy!!!! Great content. You guys got me into caving after I found myself constantly watching caving videos I decided its now or never!!! never thought I could do vertical because I am terrified of heights, but after doing my first 30ft drop scared and shaking at the top I realized it was all in my head with the help and reassurance from members in my local grotto. Stay safe and keep up the content!!!

[@purelightlove8888]

Another Awesome Adventure! Thanks!!

[@lithium444]

It's weird to think that there's probably way more places like these that could be _right underneath us_

[@qwerty4134]

theres more we havnt seen than seen

[@Kenny2k08]

@@qwerty4134imagine all the ones in Antarctica 🇦🇶

[@Muffinkakes1]

@@Kenny2k08even more ancient caves than this one, never explored and possibly miles below solid ice. Man that is a rush to imagine

[@mayw6571]

That is spectacular! What an incredible place, I cannot *believe* how big it is. Thanks for showing the rest of us!

[@marcusrangel2844]

I'm glad I enjoy these adventures through you guys. Keep it up always.

[@robyn7165]

You guys are crazy, given all I have read about our ancestors and the underworld, claustrophobia is another. May God always be with you, and thanks for sharing your incredible journeys.

[@williampacey9194]

Good grief that is one monstrous cave. You guys kill it every time. Great video.

[@BreakOutOfTheAlgorithm]

I don't know why I like watching y'all so much? Every single time without fail, I catch myself having an anxiety attack. 😂

[@paulvamos7319]

You guys should contact The Proper People and see if they can do a collaboration with you as they do exploring videos and have done a few underground videos! 😊 Love your content!

[@battle_promaster3631]

Wow! Watching you guys come down into the large room really gives perspective as to how large it is 👍🏼 thanks for sharing

[@BlueEyedColonizer]

Thank you so much for sharing. Jaw dropped with every video

[@saffycatamos]

Just incredible, but you'd never catch me jumping into that water ! Great video...AGAIN !!!

[@Keikisheiart]

This video would be so cool to see in VR for those of us that don’t have the ability to climb lol can’t even fathom how large it is!

[@jwash4302]

Good idea

[@jonathanmitchell1776]

Very good idea.

[@Motowad]

VR and 360* cameras would be a crazy experience

[@johnhall9609]

Excellent video guys, y’all rock!! God bless!!

[@Richiecuhh]

Such a cool video man all the extra effort you do is great and inspiring

[@wildmanjeff42]

There are some truly large rooms underground. I used to cave in AR. Fitton cave in Jasper, AR has a room with a lot of breakdown in the center, but it was about the size of a football field. Mammoth cave in Bowling Green Kentucky is pretty cool too. Be careful guys ! great video.

[@gomergomez1984]

Thing that gets me most about these caves is how old they are.

[@nellennatea]

Awesome. Thanks for sharing.

[@zodiac138]

This is one of my top 5 favorite youtube channel ..dope content, always! wouldbe bad ass to put up a LIVE Q&A

[@mark11967AD]

I thought it was ballsy enough to sink down into that deep abyss and light up that amazing cavern but then to go on across the river and push it to the absolute limit. I guess that’s what exploring is all about. Thanks for sharing a truly compelling adventure and without a ton of swearing reminded me of my early youth. Congrats and stay safe.

[@Oliverdixon14]

Dude that picture turned out phenomenal 😎 love y’all’s videos

[@liberatecogitare3122]

Amazing. Awesome. Thanks for sharing.

[@patrickk9176]

Great adventure and great photo of that giant room!

[@bdoubleu6]

Really reckless doing that wet rope with no gear bro

[@TheMeefmaster]

Sounds like you got a limp rope mate

[@robotrip9292]

You guy do an amazing job exploring caves and filming it in HD!

[@amberandrews6842]

Thank You for sharing your adventures with us!! ❤❤❤❤❤

[@alanporter9556]

Amazing video! Keep exploring, stay safe 👊

[@DoomCast]

Name the room The Heart of Jupiter

[@jackfabulous758]

Damn I really didn’t appreciate the size of that room until homeboy was coming down!! Yeah!!! Friday with the action adventure twins 💥

[@refuseresistlookinriseup]

pretty effing awesomwe thanx for shairing !!!!

[@patmayer7222]

Land o' lakes,wi.....along for this EPIC adventure,,,,,..............tnx,,pat

[@JOkERBIDEN]

“That crawfish scared me” 😆 I tend to forget you guys are human with all the crazy stuff you do.

[@trinitylex-a5990]

Subd to all of you guys, great adventure, keep em coming 👍

[@2flight]

Wow! amazing. Thanks for the video!

[@susanfarley1332]

Me and my husband went to visit his great uncle that owned a mountain in Tennessee. When he first bought the mountain and found the cave on his property he decided to see how far it went. He packed supplies for three days and went in . He never found the end of it. He did find that during the Civil war it had been used to store gunpowder. There were even wooden rails for a small train track in part of the cave. Indian artifacts were also in the cave as well as huge prehistoric bones. It was a dry cave and while the entrance was small once you were in you were in a big room (big enough to build a house in. My husband wanted to do that) and smaller branches led from the big entrance room. After his great uncle died his daughters sold the cave to the state. There was talk of opening it up as a tourist attraction and that it might hook up to the Cumberland Gap, but after 20 years or more nothing more was heard about it. It's a shame. When me and my husband explored it it was a pretty nice cave and very big. And every where we went in it you didn't have to use ropes or do any climbing. I was 7 months pregnant at the time and it wasn't hard around in the cave. The wooden rails were still in it. No telling what else was in it. I almost forgot to add. Before it was sold I saw it on a state map and the name of the cave was Bone cave.

[@AltairKennedy]

Van Buren County?

[@nova-super-nova]

The lighting you provided is soo cool, and amazing how dark it still is... so mysterious😚☺

[@marknorthrup7646]

Incredible! You guys are epic! What an experience that only .001 percent of the human race gets to experience. Thanks for allowing the rest of us into your crazy world for a few minutes.

[@mset510]

Thanks for filming as much as you could. You guys ROCK! SERIOUSLY! That was OTHERWORLDLY! Talk about JOURNEY TO THE CENTER OF THE EARTH!!!

[@lindaarchinal9008]

Oh yea! Love what you all are doing, well done on the video - what an outrageous cave!

[@scottspy]

You can see why some early explorers believed in a hollow Earth after finding a cave like this.

[@thatguy9927]

Just curious, haven't you already posted a video of the biggest room in America? Or am i thinking of underground explorers? Also i love your channel and look forward to all of your videos!

[@ActionAdventureTwins]

That was the second largest room in america

[@thatguy9927]

@ActionAdventureTwins lol. Kinda thought that might be the case. Keep up the adventures dudes!

[@chrishandsome6542]

Cmon man, don't be thatguy

[@richcollins513]

Déjà vu

[@daemn42]

@@ActionAdventureTwins By what metric is *this* the biggest room, given the larger dimensions of the "Big Room" in Carlsebad Cavern? Largest continuous diameter?

[@jayjs4l6]

Your videos are truly stunning! Absolutely love the content man keep up the great work; just subscribed and have been watching your videos non-stop. Stay adventurous and stay safe brother!

[@Jshankarpatel532]

Very brave you guys are. Nice video. ⭐⭐⭐⭐⭐ 👍👌👍👌👍 🙏🙂❤

[@ryanking9502]

The rumble room is incredible! Great video as always

[@user-yz7ey6mo9z]

shhh...

[@AankerStoneshield]

@@user-yz7ey6mo9zWhat? The cave is well-known

[@CjbrkBrooks]

It seems like there were already rope piles in place, along with anchored ropes. Is this an already explored cave where cavers have left supplies for subsequent cavers? Fabulous video!

[@ActionAdventureTwins]

No supply caches! In fact! We were all splitting up and wandering into random portions of the cave just trying to find the way and would have welcomed stumbling into some supply caches

[@stereothrilla8374]

The cave has already been explored by previous cavers however.

[@XxCrawdadCraigxX]

really fun watch, good video

[@frankmacleod2565]

That was one epic drop. Fantastic video

[@bhajandaniel9771]

Fantastic! But where do these deep underground ruvers go? Do they converge to form bigger rivers like on land? I could imagine them emptying into some gigantic, underground lake. They have to go somewhere. Has anyone figured out or charted where they go? It seems there's an entire network of streams, rivers...and lakes?...underneath the mountains in your area of the country. But maybe my imagination is running wild.

[@maggiesfarm7970]

I think a lot of them merge with other streams underground and eventually empty into some rivers above ground.

[@breannathompson9094]

sometimes the scientist drop a special dye, then use xrays to track the rivers underground. and even then sometimes theyre so long or far into the eart that they cant track it anymore!

[@shancunma6001]

rivers are living recycling systems, that’s why it seems like they never end. but when we put a dam on it, we’re slowly killing it.

[@ElissaBlankenship.]

@@breannathompson9094 I would be curious to see a documentary on this

[@EstamosDe]

​@@breannathompson9094you need to use glitter, u take 1 ton of red glitter and put it into the river, and there you have: all the crawlfishs are ready to party

[@michaelshultz2540]

The acoustics in there are incredible. Like being inside a giant megaphone. I am blown away. Great job documenting your adventure. Wish I could be there doing it with you so much fun. Definitely one of the things that make life wonderful. ❤

[@carlg788]

They delved too deep. You know what they awoke in the darkness.

[@winterking2004]

They woke up that crayfish, that’s for sure

[@alanriley9754]

Absailutely awesome ! Thanks

[@user-iy9cy4tl2h]

That is so very cool the camera shots of you guys repelling down the tunnel are awesome 👍👍👍✌️🇨🇦💛

[@Lightwish01]

I always find the discovery of any life deep underground to be absolutely fascinating. A lot of these underground water ways are devoid of life once you get so many meters underground. Being rare to find life deep underground makes even a crawfish extremely interesting. I mean how did it ever get down here even? The water in these underground rivers and streams filters through many meters of earth, rock and sand before it arrives down here far underground. Its not the sort of place animals can get to very easily. I doubt they will read this comment, but if they do can you guys focus in on any living animals you find living in the underground waters?

[@ActionAdventureTwins]

Yeah we somehow found what looked like dog tracks , scat, and claw marks in the cave maybe a coyote went in there but it got very deep inside the cave. We will try to show more of these animals as we encounter them!

[@Bill_Russell_aka_Coolbreeze]

Absolutely amazing! It certainly is a whole different world down under so to speak. Crazy cool. I always wonder how much of these caves you bring home on you when you rinse yourselves and all your gear off 😂

[@ActionAdventureTwins]

One time we saved all water we rinsed the clothes with and let the clay settle out in a bucket and we were able to use the clay to roll a bag full of clay slingshot ammos.... definitely a good bit still left on the clothes when we get home!

[@Bill_Russell_aka_Coolbreeze]

@@ActionAdventureTwins lol That's pretty cool. Something I never would have thought to do.

[@Flame-Bright-Cheer]

🤘🏼 just straight-up gnarly and amazing but mostly gnarly❤

[@marcos5704]

Love that you shout out your friends channels

[@MeMyselfAi-kg2ep]

"I gotta see what's over there" I love it when he does that

[@erinjoy8338]

What’s funny is that mountain at the bottom didn’t even look that big until you illuminated him with the flashlight! Insane!!

[@benninger123]

Im living my life thru u guys brcause these caves you guys go in are just amazing . I give it to use , your courageous, your willing to just keep going . Congrats.

[@georgenorthcutt6774]

What a cool cave and nice video! As a photographer, I really appreciate the photo at the end of the video!!!!! Well done sir!!!!

[@thatguy9927]

The geography of these domes is just jaw-dropping!

[@skeetermalcolm1655]

I got to give you young men credit to do what you do, great video guys

[@Life_of_Gavin]

Awesome 👏

[@David-jn4fx]

You boys are the best 🤩 you get to do and see so much always I love to see every view. Be well team 😍

[@stevensims3342]

Was that room just a giant swirling pool of water at some point? So amazing.

[@shancunma6001]

maybe a giant swimming pool at some point.

[@exploringthetributaries643]

Probably a combination of a fault line and lots of erosion.

[@leahnicoleperez]

The SCALE of that room is insane! It looks extraterrestrial

[@shancunma6001]

Albeit there’s even more extraterrestrial rooms on Venus or on Mars. There’s even hypotheses that the moon is hollow with an enormous room in it.

[@GreenManaYo]

@@shancunma6001is that just a guess or are there any reasons to why people think that?

[@shancunma6001]

@@GreenManaYo Our moon is unlike any other moons in the solar system. There are many reasons, you can google it up.

[@beetlebob4675]

​​​@@GreenManaYo There was a piece of equipment, can't recall what it was, but it hit the moon so hard that the resonant tone went on for some time, much longer than it should have. Could be from the actual material the moon is made of that we can't see under the surface, OR there are caves and pockets all beneath it like here on earth, but potentially even more ubiquitous, like swiss cheese.❤ The latter makes sense when considering how the moon and earth were formed. I wouldn't be shocked if the moon cooled differently than the earth did, potentially much much faster, as it doesn't have a spinning core like the earth does. Reminds me of the pockmarked features of quickly cooled lava rock.

[@seanstevenson7592]

Ty. Love the long vids.

[@MeMyselfAi-kg2ep]

The best way to spend a friday night, Thanks for the upload!

[@SkateClipsAndTips]

Crazy how massive it is that even the worlds brightest flashlight struggles to light up the whole cave

[@tracyadams3411]

Love your videos. Have you explored any caves in Arizona?

[@ActionAdventureTwins]

Not yet!

[@MrSkosig]

Wow amazing adventure 😅

[@DevinAwe]

yall are about it every week always makes my friday watching

[@jwalster9412]

24:49 this has to be the most surreal thing ive seen. That rope looks endless, its pitch black.

[@keksandwich]

the rumble room, nice

[@AustinKoleCarlisle]

Simply amazing.

[@cherylsibson2529]

Amazing adventure, so pack extra gear, food, clothes, and provisions up Canoe, We are in extraordinary times, so do take care.