A Shoshone encampment in Wyoming, photographed by W. H. Jackson, 1870

Ansel Adams National Archives White House Ruin, 1942,

A worker running up one of the catwalks being built for the construction of the cable of the Golden Gate Bridge, San Francisco, California, September 19, 1935

A US Navy aircraft carrier going under the Golden Gate Bridge during opening day ceremonies for traffic on the bridge, San Francisco, California, May 28, 1937

A settler in 1890 shows off the path he has cut through the giant sequoia Wawona

A journalist dashes across a bridge between to rescue a baby during Civil War in 1936

The crowd was so large that some fans had to cross over the track before the race and watch the event from the infield. June 1949

The completed Sydney Harbour Bridge, circa 1936.

On March 19, 1932, the Sydney Harbour Bridge was opened. Here's a look back at some historic photos of its construction Australia

Young Mustansar Hussain Tarar aka Chacha ji in 1956 in his college days

Italian heavy artillery guns are pictured on the Italian Front in this 1918 handout picture

British officers observe artillery fire during the battle of the Somme in this 1916 handout picture

British aeroplane shows bomb damage Feb 16 1918

A horse wears a flannelette gas mask at the Chemical Development Laboratory, Philadelphia in 1919

A German observation post is pictured on the Yser Front in Belgium, in this 1917