The Old Carreta, Laguna, New Mexico
Yellowstone National Park
Grand Cañon of the Colorado
Currecanti Needle, Black Cañon of the Gunnison
Colorado, Gray's and Torrey's Peaks
Entrance to the Highlands, Hudson River
Toltec Gorge and Tunnel (1021)
Colorado, The Upper Twin Lake
The Summit of Pike's Peak
The Cañons of Colorado
, 1870
, 1880
, 1890
, 1900
, 1940