Cosmic Cavern has gone by many names: Moore’s Cave, Mystery Cave, Maple Springs Cave and Johnson Cave, to name a few. Stumbled across during an attempt to mine lead, the cave was instead mined for calcite. (Ford Model T shifters were calcite from Cosmic Cavern.)
The cave contains many unique features, including the longest known soda straw in the Ozark Mountains at nine feet long. One of the two bottomless lakes is the largest underground lake in the Ozarks. A cave diver attempted to find the bottom by throwing his air tank into a crevice and moving further. Although he survived the attempt, he failed to find the bottom and no more cave diving was allowed.
But what makes the cave so unique is the secret area discovered in 1993 using dynamite. A hole in the cave suggested another room behind the end. This assumption was correct; the new chamber contained intact elements and an additional bottomless lake. This makes for a great comparison between what the effect of humans on the cave ecosystem looks like. The first part of the cave is covered in soot, overgrown algae and broken formations. The new chamber is pristine, with some features completely transparent.