Berryville, Arkansas
- Cosmic Cavern Cosmic Cavern was discovered in 1845, but wasn't developed until 1927.  The cave features a 9 foot soda straw - the longest known in the Ozarks, and two bottomless lakes, one of which has had trout in... Cosmic Cavern was discovered in 1845, but wasn't developed until 1927.  The cave features a 9 foot soda straw - the longest known in the Ozarks, and two bottomless lakes, one of which has had trout in...
 Cosmic Cavern