"Test your hip and chest size by trying to squeeze through the alternate entrance to Deep Cave at the Deep and Punkin Nature Preserve in Edwards County, Texas. The rest of the cave is huge and incredibly decorated with crystalline helictites, flowstone, draperies, and various other intensely colorful formations." [via]

http://feeds.boingboing.net/~r/boingboing/iBag/~3/AXWaaMRna9o/people-squeeze-though-claustro.html