Cave, a guide and two women standing at side of Bridal Altar
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
Cave, column with measuring stick against it
Mammoth Cave National Park; National Park Service
Cave, formations in Fossil Avenue, 1942
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
Cave, helictite formations, College Heights Avenue, Morrison Ave.
Mammoth Cave National Park; National Park Service
Cave, helictite formations, Morrison Avenue
Mammoth Cave National Park; National Park Service
Cave, helictite formations, Morrison Avenue
Mammoth Cave National Park; National Park Service
Cave, man looking at formations in Fossil Avenue, 1942
Mammoth Cave National Park; National Park Service
Cave, onyx colonnade formation
Mammoth Cave National Park; National Park Service
Cave, showing eight women, one boy, two men, and a guide posed in front of cave formation
Mammoth Cave National Park; National Park Service
Cave, showing eight women, one boy, two men, and a guide posed in front of cave formation
Mammoth Cave National Park; National Park Service
Cave, the Elephants Ears, College Heights Avenue
Mammoth Cave National Park; National Park Service
Cave, three cave visitors and a guide at the bottom of Frozen Niagara
Mammoth Cave National Park; National Park Service
Cave, wedding at Bridal Altar in Gothic Avenue
Mammoth Cave National Park; National Park Service
Cave, wedding at Bridal Altar in Gothic Avenue
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, woman standing beside Ruins of Karnak
Mammoth Cave National Park; National Park Service
Cave, woman standing beside Ruins of Karnak
Mammoth Cave National Park; National Park Service
Cave, woman standing near Bridal Altar area
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, women and a guide at the bottom of Frozen Niagara
Mammoth Cave National Park; National Park Service
Caves, Golden Fleece formations
Mammoth Cave National Park; National Park Service
Caves, New Discovery, Ostrich Column or Sand Crane
Mammoth Cave National Park; National Park Service
Caves, Violet City entrance formations, Jennings Stairway are at left
Mammoth Cave National Park; National Park Service
Caves, Violet City entrance formations, guide and a woman in foreground of photo
Mammoth Cave National Park; National Park Service
Caves, guide and a woman visitor at Golden Fleece in the Frozen Niagara section of Mammoth Cave
Mammoth Cave National Park; National Park Service
Caves, guide and two women at Golden Fleece, in the Frozen Niagara section of Mammoth Cave
Mammoth Cave National Park; National Park Service
Caves, gypsum flowers on Morrison Avenue
Mammoth Cave National Park; National Park Service
Caves, gypsum flowers on Morrison Avenue
Mammoth Cave National Park; National Park Service
Caves, gypsum formation on Morrison Avenue
Mammoth Cave National Park; National Park Service
Caves, onyx chamber (St. Peter's Dome) cave formations
Mammoth Cave National Park; National Park Service
Caves, onyx chamber (St. Peter's Dome) cave formations
Mammoth Cave National Park; National Park Service
Chinese Wall section of cave formation
Mammoth Cave National Park; National Park Service
Close view of cave formation crystals in cave
Mammoth Cave National Park; National Park Service
Close view of helictites, Crystal Cave
Mammoth Cave National Park; National Park Service
Close view of helictites, Crystal Cave
Mammoth Cave National Park; National Park Service
Close view of helictites, Crystal Cave
Mammoth Cave National Park; National Park Service
Close, blurry view of cave formations
Mammoth Cave National Park; National Park Service
Column in unidentified area of cave
Mammoth Cave National Park; National Park Service
Frozen Niagara area of cave with cave visitors at top of formation
Mammoth Cave National Park; National Park Service
Frozen Niagara section of Mammoth Cave
Mammoth Cave National Park; National Park Service
Frozen Niagara section of Mammoth Cave
Mammoth Cave National Park; National Park Service
Frozen Niagara section of Mammoth Cave
Mammoth Cave National Park; National Park Service
Geology, cave formations in Frozen Niagara section 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
Golden Fleece area of cave and drapery room.
Mammoth Cave National Park; National Park Service
Great onyx colonnade formations protected by cage and wire, improved lighting, Frozen Niagara, 1942
Mammoth Cave National Park; National Park Service
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