Arguably, the best views of the San Francisco skyline come from Treasure Island. which is a manmade 404-acre island that is connected to Yerba Buena Island. In 1936-37 the U.S. Army Corp of Engineers built the island next to Yerba Buena Island. Speculation and urban myth told tales that millions of dollars of gold dust had been dredged up from the bay to create the island led to the name Treasure Island. In the late 1930’s, San Francisco held its third world’s fair in less than fifty years and site chosen for the Golden Gate International Exposition, was the Yerba Buena Shoals. Financed by WPA (Works Progress Administration) over 300,000 tons of boulders were used to make a seawall around roughly one-square-mile area, and the resulting lagoon was filled in.