Treasure Island is a weird place. Named after the Robert Louis Stevenson book, Treasure Island was constructed (yes, constructed) in the 1930s as an airport. When that idea was scrapped, it was converted into a location to hold California’s world’s fair in 1939-1940. After the bombing of Pearl Harbor in 1941, the island was converted into a full naval base. From then on the island was rarely used, sitting as a reminder of World War II to the many commuters crossing the Bay Bridge. In 2005 the navy sold the island back to the city of San Francisco, prompting a repurposing of the grounds.