zip lines
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The Coolest Trampoline On Earth Is Suspended Inside A Huge Cavern
You’ve jumped on one trampoline, you jumped on them all, right? Wrong, you cynical sad sack. The mother of all trampolines is currently being readied for its public unveiling inside a series of caverns in Wales. Yep: It’s a network of trampolines hung from the walls of an old slate mine.