Carleton E. Watkins, Minerva Terraces, Mammoth Hot Springs, National Park, Yellowstone National Park, Wyoming, ca. 1890s.
Source: Beinecke Rare Book & Manuscript Library, Yale University

Carleton E. Watkins, Minerva Terraces, Mammoth Hot Springs, National Park, Yellowstone National Park, Wyoming, ca. 1890s.

Source: Beinecke Rare Book & Manuscript Library, Yale University

Francis M. Fritz, John Muir, American conservationist, 1907.

Francis M. Fritz, John Muir, American conservationist, 1907.

William Henry Jackson, Crater of Old Faithful Geyser, Yellowstone National Park, Wyoming, 1872.

William Henry Jackson, Crater of Old Faithful Geyser, Yellowstone National Park, Wyoming, 1872.

George Fiske, Overhanging Rock, Glacier Point, Yosemite Valley, California, 1910.

George Fiske, Overhanging Rock, Glacier Point, Yosemite Valley, California, 1910.

Vittorio Sella, Siniolchu from the Zemu Glacier, Sikkim, India, 1899.

Vittorio Sella, Siniolchu from the Zemu Glacier, Sikkim, India, 1899.

Vittorio Sella, Luigi Amedeo  and guides climbing an icefall on Chogolisa, Karakoram, Pakistan, 1909.

Vittorio Sella, Luigi Amedeo and guides climbing an icefall on Chogolisa, Karakoram, Pakistan, 1909.

Queen Victoria of Sweden, The river Nile at Shellal, photograph taken in the late afternoon on the 15th of February 1891.

Queen Victoria of Sweden, The river Nile at Shellal, photograph taken in the late afternoon on the 15th of February 1891.

Georg Friedrich Johannes Bley, The Dago waterfall near Bandung, Indonesia, 1920-1932.
Source: Tropenmuseum

Georg Friedrich Johannes Bley, The Dago waterfall near Bandung, Indonesia, 1920-1932.

Source: Tropenmuseum

William Bell, Chocolate butte near mouth of the Paria, Arizona, 1872.
Source: National Archives and Records Administration

William Bell, Chocolate butte near mouth of the Paria, Arizona, 1872.

Source: National Archives and Records Administration