Photographer: Gardner, R.G.
Subjects: Iowa, Rock formations, Caves, Shrubs, Jackson County (Iowa)
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Photographer: Gardner, R.G.
Subjects: Iowa, Trees, Caves, Shrubs, Jackson County (Iowa)
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Photographer: Hains, Ben
Series: Magnesium Light Views From Marengo Cave.
No.: 506
Subjects: Indiana, Caves, Stalactites & stalagmites
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Publisher: Hook, W.E.
Photographer: Hook, W.E.
Subjects: Colorado, Manitou Springs (Colo.), Caves
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Photographer: Weitfle, Charles (1836-1921)
Subjects: Colorado, Colorado, Canyons, Clear Creek Canyon (Colo.), Caves
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Subjects: California, Yosemite Valley (Calif.), Yosemite National Park (Calif.), Caves
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Subjects: California, Yosemite Valley (Calif.), Yosemite National Park (Calif.), Caves
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Subjects: California, Yosemite Valley (Calif.), Yosemite National Park (Calif.), Caves
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Subjects: California, Yosemite Valley (Calif.), Yosemite National Park (Calif.), Stairways, Caves, Walkways
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Subjects: California, Yosemite Valley (Calif.), Yosemite National Park (Calif.), Stairways, Caves, Walkways
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]