Cave, New Discovery, walls of Onyx Avenue, man with lantern in picture
Mammoth Cave National Park; National Park Service
Cave, New Discovery, a botryoidal form of travertine incrusts this wall
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
Cave, a guide and two women standing at side of Bridal Altar
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
Cave, New Discovery, gypsum which has the appearance of spun glass
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
Unidentified man leaning on rail at Frozen Niagara section of Mammoth Cave
Mammoth Cave National Park; National Park Service
Base of stairs at Drapery Room in Frozen Niagara section of Mammoth Cave
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
Cave, three cave visitors and a guide at the bottom of Frozen Niagara
Mammoth Cave National Park; National Park Service
Cave, New Discovery, gypsum, Big Cave, single man in foreground holding lantern
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
Cave, New Discovery, White Chimes or Crystal Chandelier, guide in picture
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
Caves, guide and two women at Golden Fleece, in the Frozen Niagara section of Mammoth 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
Guide and two women at base of King Solomon's Temple, Frozen Niagara section of Mammoth Cave
Mammoth Cave National Park; National Park Service
Bottom of Rainbow Domes formation showing completed protection cage surrounding cave area, improved lighting, Frozen Niagara, 1942
Mammoth Cave National Park; National Park Service
Bottom of Rainbow Domes formation showing completed protection cage surrounding cave area, improved lighting, Frozen Niagara, 1942
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
Caves, guide and a woman visitor at Golden Fleece in the Frozen Niagara section of Mammoth Cave
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, Big Paradise in New Discovery, gypsum, Big Avenue, group of five guides shown
Mammoth Cave National Park; National Park Service
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