Alvord Lake Bridge, Road bridge in San Francisco
Alvord Lake Bridge is a historic pedestrian bridge located at the eastern end of Golden Gate Park.
Built in 1889, it is one of the oldest concrete bridges in the United States.
This bridge exemplifies the use of cutting-edge, American engineering techniques of its time.
The bridge offers a scenic walkway for park visitors exploring its surroundings.
It's famed for being the first reinforced concrete bridge built using the de Burgh system.
Location: San Francisco
Official opening: 1889
Source: Wikimedia