Gypsum flowers in unidentified area of cave
Mammoth Cave National Park; National Park Service
Gypsum deposits, unknown location in cave
Mammoth Cave National Park; National Park Service
Close view of helictites, Crystal Cave
Mammoth Cave National Park; National Park Service
Geology, cave formations in radio room of cave
Mammoth Cave National Park; National Park Service
Gateway completed at Proctor Cave
Mammoth Cave National Park; National Park Service
Carry deld(sic) from cathedral domes entrance
Mammoth Cave National Park; National Park Service
'Four Roses' gypsum flowers in Cleveland Avenue area of cave
Mammoth Cave National Park; National Park Service
Pipes used to carry water used in salt petre leeching process
Mammoth Cave National Park; National Park Service
Group of three men dressed in moderately heavy clothing in mouth of cave or bluff area
Mammoth Cave National Park; National Park Service
Party taking boat ride on echo river
Mammoth Cave National Park; National Park Service
Tour group (six men) in cave with guide Leo Hunt
Mammoth Cave National Park; National Park Service
Cave, hostess in front of water fountain in Snowball Dining Room
Mammoth Cave National Park; National Park Service
Cave, helictite formations, Morrison Avenue
Mammoth Cave National Park; National Park Service
Close view of helictites, Crystal Cave
Mammoth Cave National Park; National Park Service
Golden Fleece area of cave and drapery room.
Mammoth Cave National Park; National Park Service
Cave entrance under ice and snow
Mammoth Cave National Park; National Park Service
After cave trail construction, New Discovery, 1942
Mammoth Cave National Park; National Park Service
Coincidental twins both named Pauline Taylor with guide in cave at foot of Frozen Niagara
Mammoth Cave National Park; National Park Service
Chinese Wall section of cave formation
Mammoth Cave National Park; National Park Service
Cave, rock with gypsum deposits
Mammoth Cave National Park; National Park Service
A party taken on bridge over backwater of echo river in old entrance to Mammoth Cave
Mammoth Cave National Park; National Park Service
Cave, Hindu Temple, showing cave formations
Mammoth Cave National Park; National Park Service
Cave guide and three women on stairs going down to Historic Entrance
Mammoth Cave National Park; National Park Service
Caves, Gothic Avenue, woman sitting in Jenny Lind's armchair
Mammoth Cave National Park; National Park Service
Tour group climbing up stairs in corkscrew section of cave
Mammoth Cave National Park; National Park Service
Cave visitors on trail at Dead Sea viewed from catwalk looking back toward River Hall
Mammoth Cave National Park; National Park Service
Cave trail construction, enrollees working on elevated wooden walkway in cave
Mammoth Cave National Park; National Park Service
Cave, Dead Sea under flood conditions, guide leading large group
Mammoth Cave National Park; National Park Service
Guide and cave visitors stopped on trail for a drink of water at Richardson's Spring
Mammoth Cave National Park; National Park Service
Group of visitors entering cave with lanterns
Mammoth Cave National Park; National Park Service
Old entrance, Mammoth Cave, regular trip #3 north end of floating cloud room forty feet southwest of projecting point on east wall, five feet north of southwest wall
Mammoth Cave National Park; National Park Service
Trail under construction in Violet City entrance of Mammoth Cave
Mammoth Cave National Park; National Park Service
Caves, Echo River boat ride
Mammoth Cave National Park; National Park Service
Mammoth Cave main entrance, interior shot, shows stairs and pathway and icicles and snow
Mammoth Cave National Park; National Park Service
Before cave trail construction, New Discovery, 1941
Mammoth Cave National Park; National Park Service
Before trail construction, New Discovery, 1941
Mammoth Cave National Park; National Park Service
Trail before construction in old entrance of Mammoth Cave
Mammoth Cave National Park; National Park Service
Geology, cave formations in radio room of cave
Mammoth Cave National Park; National Park Service
Cave, Echo River boat trip, four women, one man, and a guide
Mammoth Cave National Park; National Park Service
Cave, guide and tour group at Ruins of Karnak
Mammoth Cave National Park; National Park Service
Cave, five women and a guide on Crystal Lake boat ride (Echo Dome)
Mammoth Cave National Park; National Park Service
Cave, three men and a woman on hotel waitstaff setting dining tables in Snowball Dining Room
Mammoth Cave National Park; National Park Service
Completed trail, New Discovery, 1942
Mammoth Cave National Park; National Park Service
Dorothy Stoflett on trail in Olive's Bower section of cave
Mammoth Cave National Park; National Park Service
Caves, guide and tour group in boat on Echo River
Mammoth Cave National Park; National Park Service
Coincidental twins both named Pauline Taylor with guide in cave at foot of Frozen Niagara
Mammoth Cave National Park; National Park Service
Caves, onyx chamber (St. Peter's Dome) cave formations
Mammoth Cave National Park; National Park Service
Caves, group of visitors at bottom of stairs at Historic Entrance
Mammoth Cave National Park; National Park Service
Cave, helictite formations, College Heights Avenue, Morrison Ave.
Mammoth Cave National Park; National Park Service
Pipe (wood) used in war of 1812 to carry water to salt petre vats, iron band to prevent pipe from splitting
Mammoth Cave National Park; National Park Service
Gypsum flowers in unidentified area of cave
Mammoth Cave National Park; National Park Service
Interior of narrow cave entrance
Mammoth Cave National Park; National Park Service
Black CCC enrollees widening trail in cave, hand napping rock
Mammoth Cave National Park; National Park Service
Caves, Golden Fleece formations
Mammoth Cave National Park; National Park Service
Closeup of wooden beam in cave, showing mold deposits, possibly part of saltpeter vats
Mammoth Cave National Park; National Park Service
Caves, guide and tour group in boat on Echo River
Mammoth Cave National Park; National Park Service
Guide and a woman in lighted section of Specimen Avenue
Mammoth Cave National Park; National Park Service
Caves, Violet City entrance formations, Jennings Stairway are at left
Mammoth Cave National Park; National Park Service
Stairway descending the corkscrew in old entrance to Mammoth Cave
Mammoth Cave National Park; National Park Service
Visitors about to enter historic entrance of Mammoth Cave with guide
Mammoth Cave National Park; National Park Service
Caves, wooden bridge over Echo River
Mammoth Cave National Park; National Park Service
Cave visitors, woman standing by cave guide and four small children at Frozen Niagara, foot of falls
Mammoth Cave National Park; National Park Service
Cave entrance, showing drip line and equipment for digging
Mammoth Cave National Park; National Park Service
Cave, flowstone formation in Fossil Avenue, 1942
Mammoth Cave National Park; National Park Service
Before trail construction, New Discovery, 1941
Mammoth Cave National Park; National Park Service
Cave, hotel waitstaff preparing tables in Snowball Dining Room for visitors
Mammoth Cave National Park; National Park Service
View of group of visitors waiting to enter cave
Mammoth Cave National Park; National Park Service
Improved cave lighting, Frozen Niagara, 1942
Mammoth Cave National Park; National Park Service
Cave, visitors being served a meal in Snowball Dining Room by waitstaff
Mammoth Cave National Park; National Park Service
Gypsum flowers in unidentified area of cave
Mammoth Cave National Park; National Park Service
Caves, guide and a group of visitors at Frozen Niagara entrance
Mammoth Cave National Park; National Park Service
Cave, Echo River boat trip, four women, one man, and a guide
Mammoth Cave National Park; National Park Service
'Four Roses' gypsum flowers in Cleveland Avenue area of cave
Mammoth Cave National Park; National Park Service
Caves, Gothic Avenue, woman sitting in Jenny Lind's armchair
Mammoth Cave National Park; National Park Service
Cave, Drapery Room stairs and trail
Mammoth Cave National Park; National Park Service
Various angles of Frozen Niagara
Mammoth Cave National Park; National Park Service
View of cave entrance in winter
Mammoth Cave National Park; National Park Service
Portrait of a couple taken inside the cave
Mammoth Cave National Park; National Park Service
Caves, woman and a cave guide at Poplar Pipes in Methodist Church
Mammoth Cave National Park; National Park Service
Caves, woman and a cave guide at Poplar Pipes in Methodist Church
Mammoth Cave National Park; National Park Service
Cave construction, two black CCC enrollees removing sand in Fossil Avenue, 1942
Mammoth Cave National Park; National Park Service
CCC enrollees hand napping stone for cave trail
Mammoth Cave National Park; National Park Service
Black CCC enrollees widening trail in cave, hand napping rock
Mammoth Cave National Park; National Park Service
Completed pass at Jacob's Ladder in old entrance of Mammoth Cave
Mammoth Cave National Park; National Park Service
Cave, before trail construction, New Discovery, 1941
Mammoth Cave National Park; National Park Service
Rock (natural bridge) in cathedral domes trail contruction below, Supt. Pritchett standing in passage, Cave Trail construction
Mammoth Cave National Park; National Park Service
Onyx formation, new entrance to Mammoth Cave
Mammoth Cave National Park; National Park Service
Snowball dining room with cave guests eating a meal
Mammoth Cave National Park; National Park Service
Men and women at poplar pipes at Methodist church
Mammoth Cave National Park; National Park Service
Eight cave visitors and a guide looking up at unidentified area of cave
Mammoth Cave National Park; National Park Service
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