Construction, key area trunk sewer station 40+50, 1939
Mammoth Cave National Park; National Park Service
Scale showing height of cave ceiling, Cox Case
Mammoth Cave National Park; National Park Service
Man with lantern in cave, electric wires are in foreground of photo
Mammoth Cave National Park; National Park Service
Cave, Carl Hanson measuring height of ceiling, Cox Case
Mammoth Cave National Park; National Park Service
Carl Hanson showing width of cave, Cox Case
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
Downtown Horse Cave, showing tobacco barns, houses at intersection, road signs
Mammoth Cave National Park; National Park Service
Construction, showing excavation for the laying of sewage disposal line for the new cabin area, 1939
Mammoth Cave National Park; National Park Service
Forestry, showing men transplanting small Locust trees, 1939
Mammoth Cave National Park; National Park Service
Construction, Bransford Springs water supply 4" pump line looking from sta. 14x50 to about sta. 9x00, 1939
Mammoth Cave National Park; National Park Service
Group of park visitors walking down trail
Mammoth Cave National Park; National Park Service
Cave, Bridal Altar, four girls, one guide and two men posing
Mammoth Cave National Park; National Park Service
Guide on lawn of Mammoth Cave Hotel, traffic director Marvin Moody
Mammoth Cave National Park; National Park Service
Man speaking to woman on lawn of Mammoth Cave Park Office, Information, Kentucky National Park Commission, in Cave City
Mammoth Cave National Park; National Park Service
Park entry station with ranger talking to visitors in car
Mammoth Cave National Park; National Park Service
Construction, surveying on the new Echo River Road, 1939
Mammoth Cave National Park; National Park Service
Two women in Mammoth Cave looking back at Martha Washington's silhouette
Mammoth Cave National Park; National Park Service
Cave visitors, guide and guests climbing stairway, Vanderbilt Hall
Mammoth Cave National Park; National Park Service
Group portrait of eight men and women, Butler family reunion
Mammoth Cave National Park; National Park Service
Forestry, transplanting tree, 1939
Mammoth Cave National Park; National Park Service
Two men playing ping pong, Mammoth Cave Hotel
Mammoth Cave National Park; National Park Service
Forestry, transplanted tree, 1939
Mammoth Cave National Park; National Park Service
Forestry, transplanted tree, 1939
Mammoth Cave National Park; National Park Service
Dogwood, transplanting Frozen Niagara, 1939
Mammoth Cave National Park; National Park Service
Forestry, transplanted tree, 1939
Mammoth Cave National Park; National Park Service
Cave visitors, Echo River boat trip
Mammoth Cave National Park; National Park Service
Construction, new headquarters for colored employees at Mammoth Cave Hotel, 1939
Mammoth Cave National Park; National Park Service
Doorman unloading luggage from a Cadillac with 1939 California Worlds Fair license plates, Mammoth Cave Hotel
Mammoth Cave National Park; National Park Service
Completed pumphouse at Bransford Springs, 1939
Mammoth Cave National Park; National Park Service
Cave, guide and announcer just before starting in the Frozen Niagara entrance for "Men at Work" program broadcast by WSM, 1939
Mammoth Cave National Park; National Park Service
Cave, broadcast by WSM "Men at Work" program, a guide was interviewed taking the regular Frozen Niagara trip, 1939
Mammoth Cave National Park; National Park Service
Cave, New Discovery, mud cracks in lake basin
Mammoth Cave National Park; National Park Service
Erosion, tree planting, enrollee standing in the middle of trees, 1939
Mammoth Cave National Park; National Park Service
Four women playing shuffleboard
Mammoth Cave National Park; National Park Service
Doubles tennis on the Mammoth Cave Hotel front lawn
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
Man and women having a drink after tennis by courts near Mammoth Cave Hotel
Mammoth Cave National Park; National Park Service
Telephone line construction, riding messenger cable and attaching rings to carry aerial telephone cable on new telephone system line, 1939
Mammoth Cave National Park; National Park Service
Telephone line construction, using truck to stretch aerial cable on new telephone system line, 1939
Mammoth Cave National Park; National Park Service
Fire prevention, new fire truck, Chevrolet, at NP-2, 1939
Mammoth Cave National Park; National Park Service
Construction, work on operators shop at utility area, 1939
Mammoth Cave National Park; National Park Service
Telephone line construction, showing pipe line from furnace in hotel to automatic telephone switchboard house, a radiator has been installed in the switchboard house for heating it, 1940
Mammoth Cave National Park; National Park Service
Portrait, Hub Gore, Assistant Ferry Operator at Mammoth Cave, 1940
Mammoth Cave National Park; National Park Service
National Park Service warehouse under construction, 1940
Mammoth Cave National Park; National Park Service
Fire protection, Mammoth Cave employees receiving fire fighting instructions from a captain of Louisville fire department, 1940
Mammoth Cave National Park; National Park Service
Landscaping, looking towards Frozen Niagara entrance showing shrubbery, 1940
Mammoth Cave National Park; National Park Service
Completed parking lot at Frozen Niagara hotel, 1940
Mammoth Cave National Park; National Park Service
Shuffleboard outside Mammoth Cave Hotel
Mammoth Cave National Park; National Park Service
Old archway at Mammoth Cave Drive which is to be replaced with rustic entrance portals, 1940
Mammoth Cave National Park; National Park Service
Construction, beginning of Lick Log Road by camp NP-1, 1940
Mammoth Cave National Park; National Park Service
Construction, cutting down bank on road at Echo River Ferry, 1940
Mammoth Cave National Park; National Park Service
Construction, clearing right of way of Lick Log Road by camp NP-1, 1940
Mammoth Cave National Park; National Park Service
Column in unidentified area of cave
Mammoth Cave National Park; National Park Service
People eating in Mammoth Cave Hotel dining room
Mammoth Cave National Park; National Park Service
Hotel coffee shop full of diners
Mammoth Cave National Park; National Park Service
People swimming and boating on Green River, 1940
Mammoth Cave National Park; National Park Service
Five generations, 1940 homecoming, Mammoth Cave National Park
Mammoth Cave National Park; National Park Service
WGRC radio broadcasts from Echo River
Mammoth Cave National Park; National Park Service
Young man holding up dead rattlesnake
Mammoth Cave National Park; National Park Service
Incinerator under construction in utility area
Mammoth Cave National Park; National Park Service
Scout Ronald Roberson attempts to build a fire by friction as scout David Newcomb stands ready to blow hard at first sign of a spark
Mammoth Cave National Park; National Park Service
Forestry, showing tree pruner cutting off limb of tree in picnic area, 1940
Mammoth Cave National Park; National Park Service
Construction, state highway equipment laying an asphalt course on road near Mammoth Cave Hotel, 1940
Mammoth Cave National Park; National Park Service
Cars parked in front of Frozen Niagara Hotel, Labor Day, 1940
Mammoth Cave National Park; National Park Service
Construction, enlarging Katy Pace quarry, 1940
Mammoth Cave National Park; National Park Service
Construction, leveling proposed parking area near cabins, 1940
Mammoth Cave National Park; National Park Service
Rear view of the superintendents house completed, but not landscaped, 1941
Mammoth Cave National Park; National Park Service
Fire station construction, Maple Springs
Mammoth Cave National Park; National Park Service
Springhouse on unidentified hillside
Mammoth Cave National Park; National Park Service
Army activities at Mammoth Cave, soldiers in chow line
Mammoth Cave National Park; National Park Service
Army activities at Mammoth Cave, group of G.I.s posed on motorcycles
Mammoth Cave National Park; National Park Service
Army activities at Mammoth Cave, soldiers pitching tents in Freeman Field
Mammoth Cave National Park; National Park Service
Imhoff tank construction, 1941
Mammoth Cave National Park; National Park Service
Army activities at Mammoth Cave, soldiers pitching tents
Mammoth Cave National Park; National Park Service
Construction, enrollees watering and rolling cabin parking lot, 1941
Mammoth Cave National Park; National Park Service
Army activities at Mammoth Cave, half tracks parked in rear of Mammoth Cave Hotel
Mammoth Cave National Park; National Park Service
Army activities at Mammoth Cave, army unit preparing for bivouac in Freeman Field
Mammoth Cave National Park; National Park Service
Three cave visitors in cave at Boone Avenue
Mammoth Cave National Park; National Park Service
Portrait, Warden W.O. Blanton Jr.
Mammoth Cave National Park; National Park Service
Cave, Kate Schwarz, hostess, going downstairs to Snowball Dining Room, Carmichael Entrance, 1941
Mammoth Cave National Park; National Park Service
Cave, tourists in Corkscrew, 1941
Mammoth Cave National Park; National Park Service
Members of National Speleological Society on trail in Salts Cave, 1941
Mammoth Cave National Park; National Park Service
Construction, enrollees pouring imhoff tank, 1941
Mammoth Cave National Park; National Park Service
Cave, trail construction, New Discovery, 1942
Mammoth Cave National Park; National Park Service
Disabled Vets meeting in amphitheater
Mammoth Cave National Park; National Park Service
Museum collection, artifacts (large points) from the Nelson collection, 1942
Mammoth Cave National Park; National Park Service
Looking up Green River from Mammoth Cave Ferry, 1944
Mammoth Cave National Park; National Park Service
Soil and moisture work, field being plowed, 1945
Mammoth Cave National Park; National Park Service
Soil and moisture work, man walking by some type of box on the ground, 1945
Mammoth Cave National Park; National Park Service
Needed maintenance in cave, showing three stalls of bathrooms
Mammoth Cave National Park; National Park Service
Soil and moisture after treatment, 1946
Mammoth Cave National Park; National Park Service
Soil and moisture after treatment, 1946
Mammoth Cave National Park; National Park Service
Cave, visitors enter the Historic Entrance, 1946
Mammoth Cave National Park; National Park Service
Meeting, people seated at speakers table for a meal, including Krug, Barkley, and Willis
Mammoth Cave National Park; National Park Service
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