Alcatraz Island

Alcatraz Island is a small island about 1.25 miles offshore from San Francisco in San Francisco Bay, California, near the Golden Gate strait. The island was developed in the mid-19th century with facilities for a lighthouse, a military fortification, and a military prison. In 1934, the island was converted into a federal prison, Alcatraz Federal Penitentiary.

Text source: Wikipedia · Alcatraz Island (CC BY-SA 4.0)

37.8267, -122.4228 · OpenStreetMap