San Francisco is possibly one of the most beautiful cities in the world, but there's one unique perspective you probably haven't seen its vistas from—the periscope of a 1950's World War II-era submarine.
In 1951, the U.S.S. Catfish (best sub name ever), a Balao class diesel-electric submarine, took a detour through San Francisco Bay on its way north from San Diego. Apparently the crew had enough time to see the sites and fire off some photos of Coit Tower, the Golden Gate Bridge, and good ol' Alcatraz, which was still in operation as a federal prison.
Sadly, the U.S.S. Catfish met an unceremonious end. The vessel was sold to Argentina in 1971, after which the British captured it in the Falklands War and sunk it because it was too costly to repair. Bummer. [SFGate]
Photos courtesy U.S. Navy