Close view of cave formation crystals in cave
Mammoth Cave National Park; National Park Service
Caves, onyx chamber (St. Peter's Dome) cave formations
Mammoth Cave National Park; National Park Service
Cave, column with measuring stick against it
Mammoth Cave National Park; National Park Service
Golden Fleece area of cave and drapery room.
Mammoth Cave National Park; National Park Service
Cave, helictite formations, College Heights Avenue, Morrison Ave.
Mammoth Cave National Park; National Park Service
Cave, wedding at Bridal Altar in Gothic Avenue
Mammoth Cave National Park; National Park Service
Small drapery formation in radio room of cave
Mammoth Cave National Park; National Park Service
Geology, cave formations in radio room of cave
Mammoth Cave National Park; National Park Service
Geology, cave formations in radio room of cave
Mammoth Cave National Park; National Park Service
Mammoth Cave, Frozen Niagara, people shown on stairs
Mammoth Cave National Park; National Park Service
Cave, man looking at formations in Fossil Avenue, 1942
Mammoth Cave National Park; National Park Service
Caves, onyx chamber (St. Peter's Dome) cave formations
Mammoth Cave National Park; National Park Service
Cave, wedding at Bridal Altar in Gothic Avenue
Mammoth Cave National Park; National Park Service
Cave, New Discovery, travertine deposits in Fossil Avenue
Mammoth Cave National Park; National Park Service
Cave, New Discovery, gypsum which resembles ginned cotton
Mammoth Cave National Park; National Park Service
Cave, New Discovery, travertine deposits in Fossil Avenue
Mammoth Cave National Park; National Park Service
Cave, Bridal Altar, one guide and a woman posing
Mammoth Cave National Park; National Park Service
New Discovery, gypsum sprouting out of cave floor
Mammoth Cave National Park; National Park Service
Cave, New Discovery, travertine deposits in Fossil Avenue
Mammoth Cave National Park; National Park Service
Cave, New Discovery, close up of wall in Paradise Avenue
Mammoth Cave National Park; National Park Service
Geology, cave formations in Frozen Niagara section of cave
Mammoth Cave National Park; National Park Service
Cave, Evelyn Leedy standing within the Chinese Temple formation
Mammoth Cave National Park; National Park Service
Unidentified woman seated in Jenny Lind's Armchair during cave tour
Mammoth Cave National Park; National Park Service
Man and woman at cave formations in Violet City
Mammoth Cave National Park; National Park Service
Cave, Evelyn Leedy standing within the Chinese Temple formation
Mammoth Cave National Park; National Park Service
Cave, Bridal Altar, guide and a woman posing for pictures
Mammoth Cave National Park; National Park Service
Unidentified woman seated in Jenny Lind's Armchair during cave tour
Mammoth Cave National Park; National Park Service
Unidentified woman seated in Jenny Lind's Armchair during cave tour
Mammoth Cave National Park; National Park Service
Bottom of Frozen Niagara section (Drapery Room) of Mammoth Cave
Mammoth Cave National Park; National Park Service
Cave, New Discovery, concretionary travertine deposit, large basin
Mammoth Cave National Park; National Park Service
Cave, New Discovery, Onyx Altar, guides in picture
Mammoth Cave National Park; National Park Service
Cave, New Discovery, gypsum in the form of snowballs
Mammoth Cave National Park; National Park Service
Caves, Violet City entrance formations, Jennings Stairway are at left
Mammoth Cave National Park; National Park Service
Unidentified woman seated in Jenny Lind's Armchair during cave tour
Mammoth Cave National Park; National Park Service
Cave, New Discovery, Onyx Altar, guide in picture
Mammoth Cave National Park; National Park Service
Cave, woman and a guide at the bottom of Frozen Niagara
Mammoth Cave National Park; National Park Service
Cave, women and a guide at the bottom of Frozen Niagara
Mammoth Cave National Park; National Park Service
Cave, New Discovery, gypsum flowers growing on limestone ledge
Mammoth Cave National Park; National Park Service
Cave, women and a guide at the bottom of Frozen Niagara
Mammoth Cave National Park; National Park Service
Cave, New Discovery, foot of the Draperies, and flow stone basin
Mammoth Cave National Park; National Park Service
Guide and a woman walking uphill beside formations in Violet City
Mammoth Cave National Park; National Park Service
Cave, New Discovery, a guide looking at gypsum
Mammoth Cave National Park; National Park Service
Cave, Bridal Altar, four girls, one guide and two men posing
Mammoth Cave National Park; National Park Service
Cave, New Discovery, walls of Onyx Avenue, man with lantern in picture
Mammoth Cave National Park; National Park Service
Cave fencing construction, Frozen Niagara area, fencing around formations, improved lighting, 1942
Mammoth Cave National Park; National Park Service
Cave, New Discovery, fibrous gypsum growing in a cylindrical mass
Mammoth Cave National Park; National Park Service
Guide and four cave visitors at bottom of Frozen Niagara, Drapery Room
Mammoth Cave National Park; National Park Service
Cave, helictite formation in Fossil Avenue found during opening of avenue, 1942
Mammoth Cave National Park; National Park Service
Ranger and two women looking at column formations in cave, Violet City
Mammoth Cave National Park; National Park Service
Cave, bottom section of Frozen Niagara, also known as King Solomon's Temple
Mammoth Cave National Park; National Park Service
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