Guide and a woman walking uphill beside formations in Violet City
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
Guide and four cave visitors at bottom of Frozen Niagara, Drapery Room
Mammoth Cave National Park; National Park Service
Guide and three members of a tour group looking at Frozen Niagara section of Mammoth Cave
Mammoth Cave National Park; National Park Service
Guide and three women at base of King Solomon's Temple, Frozen Niagara section of Mammoth Cave
Mammoth Cave National Park; National Park Service
Guide and two women at base of King Solomon's Temple, Frozen Niagara section of Mammoth Cave
Mammoth Cave National Park; National Park Service
John Nelson with his collection of unique onyx and gypsum formations of Mammoth Cave, which were shown at the Chicago World's Fair in 1893 and have since been on exhibit at a score of state and county fairs
Mammoth Cave National Park; National Park Service
Mammoth Cave, Frozen Niagara, people shown on stairs
Mammoth Cave National Park; National Park Service
Man and woman at cave formations in Violet City
Mammoth Cave National Park; National Park Service
Man standing by cave formation
Mammoth Cave National Park; National Park Service
New Discovery, gypsum sprouting out of cave floor
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
Small drapery formation in radio room of cave
Mammoth Cave National Park; National Park Service
Steel supports and chicken wire cage, lighting formations in great onyx colonnade, improved lighting, Frozen Niagara, 1942
Mammoth Cave National Park; National Park Service
Unidentified man leaning on rail at Frozen Niagara section of Mammoth Cave
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
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
Young women at bridal alter formation in Gothic Avenue area of cave
Mammoth Cave National Park; National Park Service
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