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15 Strangest Holes On Earth

From terrifying home-swallowing sinkholes to picturesque natural caverns, we count fifteen awe-inspiring planetary cavities Facebook:   / theddguides   Twitter:   / theddguides   Gaming Channel:    / theddguides   For my gaming livestream where I typically play retro console games like NES, Gameboy, Atari, PSX, etc, visit   / dangerdolan   (and click FOLLOW to be notified for when I go live) Click here for the written version of this video: http://www.dangerdolan.tv/15-stranges... Come work for PLANET DOLAN! You can find job listings here: http://www.dangerdolan.tv/planet-dola... Legal notes ---------- Image credits & information sources for this video: http://pastebin.com/YG9cVvvd Planet Dolan PTY LTD and Danger Dolan™ have made reasonable inquiries within the timeframe available to identify the source of any images used and attribute the source accordingly. Background audio copyright Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/b...