Booth's Amphitheater in Mammoth Cave, Mammoth Cave National Park [Postcard]
Chinese Temple in Mammoth Cave [Postcard]
Crystal Lake in Mammoth Cave, Mammoth Cave National Park, KY [Postcard]
Drapery Room in Mammoth Cave, Mammoth Cave National Park, KY [Postcard]
Fairy Grotto, Mammoth Cave, In Old Kentucky [Postcard]
Frozen Niagara, New Entrance, Mammoth Cave, KY [Postcard]
Onyx Chamber, Mammoth Cave National Park [Postcard]
Onyx Colonnade in Mammoth Cave, Mammoth Cave National Park [Postcard] [Postcard]
Onyx Colonnade in Mammoth Cave, Mammoth Cave National Park, Kentucky [Postcard]
Onyx Pillars, New Entrance, Mammoth Cave, KY [Postcard]
Souvenir Folder of Mammoth Cave Kentucky [Postcard]
The Bottomless Pit, Mammoth Cave, Ky. [Postcard]
The Falls, Frozen Niagara in Mammoth Cave, Mammoth Cave National Park, KY [Postcard]
View in the Colonnadem Great Onyx Cave, Mammoth Cave National Park [Postcard]
