The Presidio Golden Gate Park should be near the bridge with that name, overlooking the entrance to San Francisco Bay. But it isn't. That other great open space, the Presidio, is.
If this 213-year-old, 1,400-acre facility is closed as a U.S. Army fort, it will still remain in public ownership, under the jurisdiction of the National Park Service. But its future uses are far from decided.
What is this immense public legacy, and what are the best ways to get to know it ...