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This video is part two of my explorations of Rosebush Quarry. This time, I send the drone into a tunnel in the quarry works - a sneak peak inside the entrance of a historic slate works. The tunnel structure is starting to deteriorate so I didn't go inside, however the drone did a fine job of exploring instead! Abandoned shafts and tunnels are incredibly dangerous and should never be entered. There was no GPS signal in the tunnel and the section away from the entrance was very dark. If I had lost the drone, I would have left it in there! Fortunately I successfully flew the drone in and back out again.
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