Among the Sierra Nevada Mountains, California, 1868.
Albert Bierstadt 
Oil on canvas, 72 x 120 in. 
National Museum of American Art, Smithsonian Institution; 

The Rocky Mountains, Lander's Peak, 1863

Albert Bierstadt (1830–1902)
American

Albert Bierstadt, Among the Sierra Nevada Mountains, California, 1868, oil on canvas, 72 x 120 inches, 

Frederick Edwin Church
Falls of Niagara
1857
oil on canvas

Frederick Church

A Twilight in the Wilderness,
40x64",1860, oil, The Cleveland
Museum of Art. 

The Course Of Empire: The Arcadian or Pastoral State, c. 1836.
Thomas Cole
Oil on canvas, 39 1/4 x 63 1/4 in. 
The New-York Historical Society, accession number 1858.2. 

The Course of Empire: Savage State, n.d. 
Thomas Cole
Oil on canvas, 39 1/4 x 63 1/4 in. 
The New-York Historical Society, accession number 1858.1. 

Falls of Kaaterskill, 1826.
Thomas Cole 
Oil on canvas, 43 x 36 in. 
The Warner Collection of Gulf States Paper Company, Tuscaloosa, Alabama. 

View from Mount Holyoke, Northhampton, Massachusetts, 
after a Thunderstorm--The Oxbow, 1836.
Thomas Cole
Oil on canvas, 51 1/2 x 76 in. 

Kindred Spirits, 1849. 
Asher B. Durand
Oil on canvas, 44 x 36 in. 
Collection of The New York Public Library; 
Astor, Lenox and Tilden Foundations. 

Thomas Moran

The Grand
Canyon of the Yellowstone,
84x144", 1872, oil, U.S. Department
of the Interior.