Grand Avenue Tour, Mammoth Cave National Park, Kentucky

[@gmaneis]

I took that tour when JFK was president. Never will forget it. Fantastic to see it again. Mammoth is so eerie, gloomy, magnificent in its enormity, and rich in its colorful and extensive history. Thank you so much for sharing your great video!

[@enerbeiser]

What’s was the length and elevation change in this tour?

[@youareamazing13]

Pretty sure it’s like 4 hours