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716
Black CCC enrollees widening trail in cave, hand napping rock Mammoth Cave National Park; National Park Service
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Circa 1934
Black CCC enrollees widening trail in cave, hand napping rock Mammoth Cave National Park; National Park Service
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Circa 1934
Blue Grotto Caves, Lava Beds National Monument, California Kings Mountain National Military Park Blue Grotto Cave
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Bottom of Frozen Niagara section (Drapery Room) of Mammoth Cave Mammoth Cave National Park; National Park Service
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1939-06
Boys on Kemper Trail, old and new trail on Tribble's Trouble, 1935 Mammoth Cave National Park; National Park Service
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1935-07-26
Boys on Kemper Trail, old and new trail on Tribble's Trouble, 1935 Mammoth Cave National Park; National Park Service
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1935-07-26
Bridge before construction in Mammoth Cave, 1938 Mammoth Cave National Park; National Park Service
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1938-05-10
CCC enrollees hand napping stone for cave trail Mammoth Cave National Park; National Park Service
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Circa 1934
Cairns Trail construction cave, no 4 entrance of Mammoth Cave Trail and large cave room, 1935 Mammoth Cave National Park; National Park Service
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1935-01-12
Carl Hanson measuring stalagmite and stalactite formation, Cox Case, 1939 Mammoth Cave National Park; National Park Service
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1939-03-30
Carl Hanson measuring stalagmite formation, Cox Case, 1939 Mammoth Cave National Park; National Park Service
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1939-03-30
Carl Hanson showing height of ceiling, Cox Case Mammoth Cave National Park; National Park Service
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1939-03-30
Carl Hanson showing height of ceiling, Cox Case Mammoth Cave National Park; National Park Service
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1939-03-30
Carl Hanson showing height of ceiling, Cox Case Mammoth Cave National Park; National Park Service
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1939-03-30
Carl Hanson showing width of cave, Cox Case Mammoth Cave National Park; National Park Service
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1939-03-30
Carry deld(sic) from cathedral domes entrance Mammoth Cave National Park; National Park Service
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Circa 1935
Cave Kiva Jean Lafitte National Historical Park and Preserve
Circa 1973
Cave cliff walk Mammoth Cave National Park; National Park Service
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1939-03-30
Cave construction, New Discovery cave passage with unidentified tools against wall of passage, 1941 Mammoth Cave National Park; National Park Service
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Circa 1941
Cave construction, black enrollees working in cave installing improved lighting in Frozen Niagara, 1942 Mammoth Cave National Park; National Park Service
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Circa 1941
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Items per page (20):
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About 780 Items

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