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View out of Thor's Cave, Staffordshire, England. High on a limestone crag above the River Manifold a series of many chambers make up Thor's cave. You can reach it by a stairway from the Manifold track, the path follows one of the Peak District's 'disappearing' rivers, which seep deep into the cracks of the limestone.
Belize ... This is called the ATM Tour or ATM Cave. It's amazing, you swim in with headlamps on and climb rocks and ladders to get to different levels. On each 'platform' you observe different artifacts. It's pitch dark inside with flowing water. Once in a lifetime tour, there are 25 guides that go through special training to be allowed to take tourists in the cave.
"Old Man's Cave," located at Hocking Hills State Park in southern Ohio, got its name from hermit Richard Rowe who made the large cave home in the early 1800s. (photo: Heather Morris)