Stalactites and stalagmites in a small alcove along the side of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Speleothems (including stalactites, stalagmites, a column, and helictites) in an alcove of the Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
A narrow stalagmite with a large cluster of stalactites in the Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Huge stalagmite named "Rock of Ages" in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Massive stalagmites in Hall of Giants of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Massive stalagmites in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Stalactites and massive stalagmites in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Stalagmites in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
Stalagmites in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007