Aerial view of a city, San Francisco, California, USA

Suspension bridge, Golden Gate Bridge, San Francisco, California, USA

Bridge across the sea with a city in the background, Golden Gate Bridge, San Francisco, California, USA

Monks walking near a bridge, Golden Gate Bridge, San Francisco, California, USA

Yerba Buena Gardens, San Francisco, California, USA

USA, New York City, skyline

High angle view of a cityscape, Boston, Suffolk County, Massachusetts, USA

High angle view of a cityscape, Boston, Suffolk County, Massachusetts, USA

USA, New York City, skyline

Low angle view of skyscrapers, Los Angeles, California, USA

USA, New York City, skyline

High angle view of buildings in a city, Boston, Suffolk County, Massachusetts, USA

High angle view of a baseball stadium, Fenway Park, Boston, Suffolk County, Massachusetts, USA

USA, New York City, high angle view of crowds outside cathedral

USA, New York City, UN Building

USA, New York City, Manhattan skyline

Seattle, USA

Seattle, USA

Vintage American Civil War print of the City of Atlanta, Georgia, circa 1863.

World War II photo of RMS Queen Mary arriving in New York harbor.

High angle view of a city, San Francisco, California, USA