Detail of the alien world of Texas’ Inner Space Cavern.
Detail of rock formations from Inner Space Cavern, Georgetown, Texas.
A pool of water amongst the stalagmites, stalactites and other rock formations in Inner Space Cavern, Georgetown, Texas.
An Eastern Pippistrelle bat sleeping in Inner Space Cavern, Georgetown, Texas. These bats, also known as Butterfly Bats, are the second-smallest species of bat in the United States.
Sunlight streams through a small opening in the roof of a cave at Oklahoma’s Turner Falls Park.
A candle highlights graffiti in a small cave at Turner Falls Park, Oklahoma.