After the bungled attempt to retrieve the smuggled heroin the drug ring calls in two out-of-town crooks to take over. They fly in from Miami.
Then ... They fly in on a United DC-7 over the Golden Gate Bridge. Marin County to the north is at the top of the frame and the Presidio at the bottom.
... and Now, there's an expanded south bridge area with a tourist car park. On the northern side there's now a marina at Horseshoe Bay, home of the Presidio Yacht Club. Behind that is the former U.S. Army Post, Fort Baker, now housing the Discovery Museum and an upscale hotel - The Lodge At Cavallo Point.