By period

19th Century Landmarks

The Washington Monument at dusk on the National Mall.

Washington Monument

District of Columbia

The restored Wesleyan Chapel in Seneca Falls, site of the 1848 convention.

Women's Rights National Historical Park

New York

The famous 1869 photograph of the golden spike ceremony at Promontory Summit.

Promontory Summit

Utah

The Gothic Revival facade of Eastern State Penitentiary in Philadelphia.

Eastern State Penitentiary

Pennsylvania

The black-and-white spiral tower of Cape Hatteras Lighthouse.

Cape Hatteras Lighthouse

North Carolina

The red sandstone Smithsonian Institution Building, known as the Castle, on the National Mall.

Smithsonian Institution Building

District of Columbia

A San Francisco cable car climbing one of the city's steep hills.

Cable Car System

California

The Gateway Arch rising above downtown St. Louis.

Gateway to the West Historic District

Missouri

Fort Mackinac viewed from the water on Mackinac Island.

Mackinac Island Historic District

Michigan

The American Falls at Niagara Falls State Park.

Niagara Reservation

New York

Bethesda Terrace and the lake in Central Park, with the Manhattan skyline behind.

Central Park

New York