Limestone tunnel in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Drapery and ripple-shaped patterns of travertine flowstone speleothems in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Travertine speleothems along a passage in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Stalactites and stalagmites in a small alcove along the side of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Columns in a small side alcove in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Irregularly rounded- or scallop-shaped passages in 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
Massive stalagmites in Hall of Giants of 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
Narrow passage in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Massive stalagmites in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Flowstone feature in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Serpentine path of "Natural entrance" to Carlsbad Caverns. New Mexico, December 26, 2007
A column and other speleothems in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Lions Tails hanging 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
Pointed formations in caves of Carlsbad Caverns. New Mexico, December 26, 2007
The village of Siloah (Silwan) built over ancient caverns of the Jewish necropolis viewed from the opposite side of Kidron Valley. Jerusalem, the Middle East, July 12, 2001
Cholla cactus in snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
A cave in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
A tourist on a trail above Whirlwind Gorge taking a picture of a waterfall of Cavern Cascade in Watkins Glen State Park. New York, October 9, 2005
Stalagmites in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
Spacious hall in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
Stalactites in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
Irregularly shaped limestone formations along a passage of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Bone-shaped limestone formations along a passage of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
The King s Throne in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
Hall of the Mountain King(?) in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
Fresh snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
Pluto s Anteroom(?) in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
A waterfall of Cavern Cascade in Watkins Glen State Park. New York, October 9, 2005
The Watchtower in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
Limestone formations in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Stalagmites in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
A hall in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
Agaves and cacti in snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
Angels Showers waterfall in a cave of Ozark Caverns in Lake of the Ozarks State Park. Missouri, September 10, 2005
Cave of Brightness (Musfer Cavern, Dahl Al Misfir) sinkhole in south central area. Qatar, February 19, 2010
A cave of Ozark Caverns in Lake of the Ozarks State Park. Missouri, September 10, 2005
Prickly pears cactus in snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
Interior of Cave of Brightness (Musfer Cavern, Dahl Al Misfir) sinkhole in south central area. Qatar, February 19, 2010
Plants in snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
Ocotillo bush near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
