Designed to mount 126 cannons with a range of up to 2 mi, the fort was constructed between 1853 and 1861 to protect San Francisco from a Civil War sea attack that never materialized. It was, however, used as a coastal-defense-fortification post during World War II, when soldiers stood watch here. This National Historic Site is now a museum filled with military memorabilia. The building has a gloomy air and is suitably atmospheric. (It's usually chilly and windy, too, so bring a jacket.) On days when Fort Point is staffed, guided group tours and cannon drills take place. The top floor affords a unique angle on the bay. Take care when walking along the front side of the building, as it's slippery and the waves have a dizzying effect. Though it's only open Friday through Sunday, Fort Point may soon be open during the week; call ahead for hours. Southeast of this structure is the Fort Point Mine Depot, an army facility that functioned as the headquarters for underwater mining operations throughout World War II. Today it's the Warming Hut, a National Park Service café and bookstore.
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