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Colossal cave adventure

Bounce Below: A Giant Network of Trampolines Suspended in an Abandoned Welsh Slate Mine http://www.thisiscolossal.com/2014/06/bounce-below-trampolines-wales/

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The 15-million-year-old Colossal Cave. In Pheonix, AZ PHOTOGRAPHY COURTESY COLOSSAL CAVE MOUNTAIN PARK

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Colossal Cave, Vail, Arizona - Tours are given daily, on the hour, year-round. You need no special clothing in the Cave, which is always 70 degrees and dry and you are welcome to take pictures inside. (Photo via Instagram by @gotmet)

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It broke my heart when the Bamiyan Buddhas were destroyed... without ever discussing them before, my little Harry has started asking when he can see the remains. I hope Afghanistan is stable enough one day.

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Mammoth Cave, Kentucky. By far, the world's longest known cave system, encompassing over 390 miles of passageways. Went down these stairs on my tour--wouldn't do that again. Unless you want to walk long distance in tight places; take the short trip in and you see the best parts anyway.

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