Permission to use this image must be obtained from the San Francisco History Center, San Francisco Public Library. www.sfpl.org/permissions.
Nota
Folder: S.F. Bridges-Golden Gate-Views. On back: "Only in San Francisco can three Wonders of the World be photographed in a single picture. The world's two greatest bridges and Treasure Island, the largest island ever constructed by man, are shown here. The famed Golden Gate Bridge in the foreground has the longest single span of any bridge on earth; the San Francisco-Oakland Bay bridge has the greatest total length. Treasure Island, 400-acre site of the 1939 Golden Gate International Exposition celebrating the completion of these two bridges, required 20,000,000 cubic yards of sand fill dredged from the bottom of San Francisco Bay. The rock sea wall surrounding the island required 287,000 tons of rock. If all the material used in the building of this site for the $50,000,000 Fair had been transported by rail it would have required a freight train 200 miles long. Carl Wallen (AS-101)"