The Industrial Revolution was at its height in the mid-19th century, but it was still in full swing in the early 20th century, when these photos were taken. They offer a portrait of the U.S. looking profoundly different. But it was also when we built many of our great bridges and public works, so some things have remained the same.

Mott Street, Chinatown, New York, c. 1900

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

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The Flatiron Building under construction, New York City, c. 1902

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

(via Library of Congress)

Times Square, New York City, c. 1904

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

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Broadway and Times Building (1 Times Square), New York City, c. 1905

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

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The Main Tower in Luna Park, Coney Island, New York City, c. 1905

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

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Manhattan entrance to Brooklyn Bridge, New York, c. 1905

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

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Night in Luna Park, Coney Island, New York City, c. 1905

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

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Atlantic City bathers in front of the Marlborugh-Blenheim Hotel, the Hotel Traymore and Brady's Baths, 1906

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

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Williamsburg Bridge Plaza, New York City, c. 1906

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

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Wabash Avenue, Chicago, Illinois, 1907

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

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Workers dig the street along the sidewalk on the north side of Delancey Street, New York, July 1908

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

(via AP Photo/New York City Municipal Archives, Department of Bridges/ Plant & Structures, Eugene de Salignac)

The Shelton Square with the St. Paul Episcopal Cathedral, the Prudential Building and the Erie County Savings Bank in Buffalo, New York, c. 1908

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

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The superstructure from the Manhattan Bridge rises above Washington Street, New York, June 1908

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

(via AP Photo/New York City Municipal Archives, Department of Bridges / Plant & Structures, Eugene de Salignac)

Manhattan Bridge, 1909

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

(via Library of Congress)

Unloading cotton from a paddle steamer named City St. Joseph in Memphis, Tennessee, c. 1910

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

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Claude Grahame-White, famed British aeronaut landed his Farman biplane in West Executive Ave., Washington, D.C. on Oct. 14, 1910.

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

(via AP Photo)

Dearborn Street Station, Chicago, c. 1910

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

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Wall Street, 1911

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

(via Library of Congress)

The East Cambridge Bridge in Boston, c. 1912

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

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Big buildings of Lower Manhattan, c. 1912

Century-Old Photos of the U.S. Take Us Back to the Industrial Age(via Shorpy)

Elizabeth Street, New York, 1912

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

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The Detroit City Hall an the Dime Savings Bank under construction, August 1912

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

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Painters are suspended from wires on the Brooklyn Bridge, New York, October 1914

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

(via AP Photo / New York City Municipal Archives, Department of Bridges / Plant & Structures, Eugene de Salignac)

New York Public Library, 1915

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

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An ice fountain on Washington Boulevard, Detroit, Michigan, 1910s

Century-Old Photos of the U.S. Take Us Back to the Industrial Age

(via Library of Congress)