American Timeline Collection

Blackfoot Chief
circa 1910: A chief of the Blackfoot tribe on horse-back and wearing traditional dress and headdress, in western Canada. (Photo by Spencer Arnold Collection/Hulton Archive/Getty Images)

Building Bridges
Full-length image of a worker pausing near the top of the George Washington Bridge during its construction, New York City, circa 1930. (Photo by Archive Photos/Getty Images)

Atom Bomb Tests
25th July 1946: Aerial view of a mushroom cloud rising from the underwater atom bomb test Baker. Image taken from an aF airplane. (Photo by Hulton Archive/Getty Images)

Gold Mining
circa 1900: Gold panners sifting at the riverside. (Photo by Keystone/Getty Images)

Culps Hill
circa 1863: A war memorial at Culps Hill on the battlefield at Gettysburg. (Photo by Spencer Arnold Collection/Hulton Archive/Getty Images)

Union Pacific
The original wooden viaduct at Dale Creek, Wyoming, built for the Union Pacific railroad. It was later replaced by a steel construction before the route was abandoned altogether

Blackfoot Teepees
circa 1950: Blackfoot teepees at Glacier National Park, Montana. (Photo by Fox Photos/Getty Images)

Uncle Sam
circa 1850: Uncle Sam holds a large live turkey in a postcard entitled Thanksgiving Greetings. (Photo by Hulton Archive/Getty Images)

Canal Construction
circa 1909: Construction of the Panama Canal. (Photo by Hulton Archive/Getty Images)

Andrew Johnson
circa 1855: Andrew Johnson (1808 - 1875), Governor of Tennessee and later the 16th vice-president and 17th president of the United States

The Last Lincoln
6th March 1865: Abraham Lincoln (1809 - 1865), the sixteenth President of the United States, in the year of his assassination. (Photo by Henry F. Warren/MPI/Getty Images)

Panning For Gold
circa 1855: Chinese workers panning for gold in California. A man in a coolie hat digs as another man kneels and sifts. (Photo by Hulton Archive/Getty Images)

Log Cabin
Women and children outside a log cabin. (Photo by Hulton Archive/Getty Images)

Gold Rush
Full-length image of three men and a woman standing and crouching around a riverbed while panning for gold during the Klondike gold rush, Alaska. (Photo by Hulton Archive/Getty Images)

Centennial Wagon
Studebaker Centennial Wagon, manufactured by the Studebaker Brothers of Indiana, sits outdoors on a brick lane, undated. The wagon won the Gold Medal

US Highway
A highway runs through a landscape of oil derricks. (Photo by Hulton Archive/Getty Images)

At Sub-Treasury
November 1929: The Sub-Treasury Building (now Federal Hall National Memorial) opposite the Wall Street Stock Exchange in Manhattan, New York, at the time of the Wall Street Crash

Bandit
circa 1849: A Californian gold miner. (Photo by Three Lions/Getty Images)

Nash Lathe
Sylvester Nashs lathe for turning musket barrels devoloped at the Springfield Armory in Massachusetts in 1817 and patented April 11, 1818

Loading The Magnolia
1861: Cottonbales being thrown into the riverboat Magnolia. (Photo by Rischgitz/Getty Images)

Christian Commission
circa 1865: Predecessors of the Red Cross, the Christian Commission and the Sanitary Commission, attending the wounded on the battlefield during the American Civil War

Yosemite Valley
The Half Dome in Yosemite Valley, a glacial gorge about 7 miles long and 1 mile wide running through the Yosemite National Park in California. (Photo by Carleton E. Watkins/Getty Images)

A Field In California
circa 1925: An oil field in California. (Photo by General Photographic Agency/Getty Images)

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