194000 - Large passage and breakdown in a Grand Canyon cave. (cave;large;stalactites;passage;)
.
194001 - Cave with orange column (iron impurities), Swiss Alps. (people;cave;column;stone;)
.
194002 - Helictites (eccentric stalactites) and shields, Arizona. (stalactites;helicites;sheilds;cave;)
.
194003 - Colorful flowstone formation, Guadalupe Mts., New Mexico. (cave;flowstone;formation;stone;)
.
194004 - Large flat-ceilinged trunk passage, Tennessee. (cave;passage;stone;people;)
.
194005 - Lake and tiered-shelfstone in conglomerate cave, Spain. (cave;conglomerate;tiered-shelfstone;people;)
.
194006 - Stalagmite growing in thousand year old Mayan pot, Belize. (cave;stalagmite;pots;mayan;)
.
194007 - A forest of broomstick columns, Guadalupe Mts., New Mexico. (cave;columns;stalactites;people;)
.
194008 - Rimstone basins in Mexico's Cueva del Tecolote. (cave;basin;rimstone;people;)
.
194009 - Lake and large stalagmite, Tower Place, Lechuguilla Cave, NM. (cave;lake;stalagmite;water;)
.
194010 - Orange flowstone and stalactites, Lechuguilla Cave, NM. (cave;flowstone;stalactites;stone;)
.
194011 - Stream canyon carved by flowing water, Indiana. (people;canyon;stream;water;)
.
194012 - Cave passage, Horsethief Cave, Wyoming. (cave;passage;people;formation;)
.
194013 - Cave passage in the roppel section of Mammoth Cave, KY. (cave;passage;people;stallactites;)
.
194014 - White stalagmite on red flowstone, Lechuguilla Cave, NM. (cave;flowstone;stalagmite;rocks;)
.
194015 - Stream goes underground in alpine cave, California Sierras. (stream;cave;water;bushes;)
.
194016 - Large entrance to Cueva de Infiernillo, Mexico's longest cave. (entrance;cave;bushes;trees;)
.
194017 - Moderate sized entrance to a Grand Canyon cave, Arizona. (cave;entranced;cliff;mountain;)
.
194018 - Huge chamber in the Chiquibul Cave System, Belize. (cave;chamber;stone;chiquibul;)
.
194019 - Huge passage in the Chiquibul Cave System, Belize. (cave;passage;chiquibul;stone;)
.
194020 - Huge cave passage in Ogle Cave, New Mexico. (cave;passage;ogle;stone;)
.
194021 - Pool, flowstone, and gypsum in Lechuguilla Cave, NM. (cave;pool;people;gypsum;)
.
194022 - Caver peers over rimstone pools, Crystal Sequoia Cave, CA. (cave;stalagmites;people;pools;)
.
194023 - Caver descends into wet canyon in banded marble, CA. (canyon;people;water;stream;)
.
194024 - Rafting an underground lake in a Grand Canyon cave. (cave;lake;water;rafting;)
.
194025 - Climbing up through a waterfall in Mexico's Cueva de Infiernillo. (waterfall;cave;water;people;)
.
194026 - Lake of the Blue Giants in Lechuguilla Cave, New Mexico. (cave;lake;water;pool;)
.
194027 - Rafting a lake in Lechuguilla Cave, New Mexico. (cave;lake;water;rafting;)
.
194028 - Following an underground river in the Grand Canyon, Arizona. (people;river;water;cave;)
.
194029 - Rafting an underground lake in a Grand Canyon cave. (rafting;lake;water;cave;)
.
194030 - Waterfall in the twilight zone of Mexico's Cueva del Chorreadro. (waterfall;cave;water;people;)
.
194031 - Repelling next to a waterfall, Sistema Chichicasapan, Mexico. (waterfall;cave;water;people;)
.
194032 - Repelling next to a waterfall, Sistema Chichicasapan, Mexico. (people;waterfall;water;cave;)
.
194033 - Lake and large shelfstone, Lechuguilla Cave, New Mexico. (lake;cave;shelfstone;water;)
.
194034 - Rafting a large lake, Grotte du Gournier, France. (lake;water;cave;rafting;)
.
194035 - 200' high waterfall, West Virginia. (waterfall;water;cave;stone;)
.
194036 - Lake and shelfstone pools, Lechuguilla Cave, New Mexico. (pools;shelfstone;water;cave;)
.
194037 - Climbing a waterfall in Mexico's Cueva del Chorreadro. (waterfall;water;cave;people;)
.
194038 - Caver ascends in shaft of light, Hellhole, West Virginia. (cave;caver;light;people;)
.
194039 - Cavers ascending 250' pit, Virginia. (cave;pit;caver;people;)
.
194040 - Caver descending a 150' pit in Tennessee. (cave;caver;pit;people;)
.
194041 - Caver ascending pit, Sonusco, Mexico. (people;pit;cave;caver;)
.
194042 - Cavers in sunbeam, Sotano de las Golondrinas, Mexico. (people;caver;cave;sunbeam;)
.
194043 - Looking straight up flowstone encrusted 160' pit, Alabama. (cave;flowstone;pit;hole;)
.
194044 - Cavers ascending 150' pit, Alabama. (people;cavers;cave;pit;)
.
194045 - Cable ladder ascent of a 40' pit in the California Sierras. (people;cave;ladder;caver;)
.
194046 - Large boneyard passage, Lechuguilla Cave, New Mexico. (cave;people;passage;caver;)
.
194047 - Thousands of soda straws off-trail, Carlsbad Caverns, NM. (people;caver;cave;straws;)
.
194048 - Following a deep canyon passage in the California Sierras. (canyon;people;passage;cave;)
.
194049 - Exploring virgin passage, New Guinea. (cave;stallactites;people;caver;)
.
194050 - Heavily decorated passage in Yo Acres, Lechuguilla Cave. (cave;passage;decorated;shadows;)
.
194051 - Ancient waterline with iron staining in Lechuguilla Cave. (cave;waterline;people;caver;)
.
194052 - World's largest gypsum formations-chandeliers in Lechuguilla. (cave;people;gypsum;chandeliers;)
.
194053 - World's largest gypsum formations-chandeliers in Lechuguilla. (cave;chandeliers;gypsum;shadows;)
.
194054 - Climbing up to the Jailbreak Passage in a New Guinea cave. (cave;passage;shadows;people;)
.
194055 - Huge aragonite tower in Lechuguilla Cave, New Mexico. (cave;aragonite;rock;shadows;)
.
194056 - Columns and towering formations, Tower Place, Lechuguilla. (cave;columns;people;shadows;)
.
194057 - Dipping from a pool beneath orange flowstone, Lechuguilla. (pool;cave;water;peole;)
.
194058 - Flowstone and rimstone terraces, Grotte du Gournier, France. (cave;terraces;flowstone;rimstone;)
.
194059 - Canyon passage in blue marble, Klamath Mountains, CA. (canyon;people;marble;people;)
.
194060 - Large stalagmite cluster, Lechuguilla Cave. (cave;stalagmite;people;rock;)
.
194061 - White draperies; or bacon, California Sierras. (cave;draperies;people;rock;)
.
194062 - Soda straws and stalagmites, New Mexico. (cave;people;stalagmites;rock;)
.
194063 - Looking through a natural hole festooned with flowstone, NM. (cave;hole;flowstone;people;)
.
194064 - Huge flowstone columns, Ogle Cave, New Mexico. (cave;flowstone;columns;rock;)
.
194065 - Heavily decorated chamber in the Guadalupe Mts., New Mexico. (cave;stalactites;stalagmites;rock;)
.
194066 - Water and banded marble in California's Sierra Nevada. (cave;water;marble;people;)
.
194067 - Stream passage in marble, California's Sierra Nevada. (cave;stream;water;people;)
.
194068 - Shelfstone columns showing old waterline, Guadalupe Mts., NM. (waterline;columns;cave;shelfstone;)
.
194069 - Butterscotch-colored flowstone, Guadalupe Mts., New Mexico. (cave;rocks;flowstone;people;)
.
194070 - Cracked columns in lower Carlsbad Caverns, New Mexico. (columns;people;cave;stallactite;)
.
194071 - Long stalactites, New Mexico. (cave;stallactites;people;shadows;)
.
194072 - Permanent ice formations, Wyoming. (cave;ice;people;shadows;)
.
194073 - Close-up of hexagonal ice crystals on cave ceiling, Wyoming. (crystal;ice;cave;hexagonal;)
.
194074 - Stream canyon carrying water into a Mexican river cave. (canyon;stream;water;cave;)
.
194075 - Feathered columns, Loltun Room, Chiquibul Caves, Belize. (columns;cave;rock;shadows;)
.
194076 - Cave pearls. (cave;pearls;rock;shadows;)
.
194077 - Cave pearls. (cave;rock;pearls;shadows;)
.
194078 - Unusual cylindrical cave pearls. (cave;pearls;cylindrical;shadows;)
.
194079 - Cave pearls cemented into a cluster. (cave;pearls;cluster;shadows;)
.
194080 - Eroding stalagmites reflect a change in water chemistry. (stalagmites;cave;eroding;water;)
.
194081 - Close-up of layering in an eroding stalagmite. (cave;stalagmite;shadows;layering;)
.
194082 - Rare feathered aragonite bush. (cave;shadows;aragonite;bush;)
.
194083 - Aragonite-tipped soda straw. (cave;shadows;aragonite;rock;)
.
194084 - Gypsum flowers. (cave;gypsum;flowers;shadows;)
.
194085 - Rare gypsum beard formation. (cave;gypsum;formation;shadows;)
.
194086 - Selenite crystals. (cave;selenite;crystals;shadows;)
.
194087 - Translucent orange stalactites. (cave;stallactites;shadows;translucent;)
.
194088 - Orange soda straws, indicating iron impurities. (cave;shadows;rock;impurities;)
.
194089 - Helictites-eccentric dripstone formations. (cave;dripstone;shadows;helicitites;)
.
194090 - Unusual snake-dancer helictites. (cave;shadows;rock;helicitites;)
.
194091 - Multi-colored dripstone deposits in the Guadalupe Mts., NM. (cave;dripstone;stalactites;stalagmites;)
.
194092 - Lava tube cave, Washington. (cave;lava;tube;shadows;)
.
194093 - Lava river cave, Oregon lava tube. (cave;lava;river;rock;)
.
194094 - Hawaiian lava tube with Ohia tree roots. (cave;lava;tube;shadows;)
.
194095 - Lava tube with golden ceiling, Lava Beds Nat'l Monument, CA. (cave;lava;tube;rock;)
.
194096 - Lava tube with golden ceiling, Lava Beds Nat'l Monument, CA. (lavba;tube;cave;rock;)
.
194097 - Lava tube showing curbs marking different flows, California. (lava;tube;cave;rock;)
.
194098 - Rare blind white cave crab from Belize. (cave;crab;blind;rock;)
.
194099 - Climbing the scalloped walls of a granite cave, California. (people;cave;shadows;rock;)
.