Centuries worth of crazy stuff has happened in the Presidio
Culturally, it does make some amount of sense that we might overlook the Presidio. It was only given to the National Park Service in 1994, after all -- for centuries, it was a military base for Spain, Mexico, and then the US. Before that, the Ohlone people lived there. It was even once offered as the possible site for the UN headquarters, which ultimately went to New York instead. Their loss. All of that history is part of what makes The Presidio such an interesting place, and why it's a National Historic Landmark. You know what Golden Gate Park was before it was a park? Nothing.
As part of the deal to take over the military base, the Presidio Trust, which runs operations in the park, has rehabbed hundreds of historic buildings. I'm not exactly suggesting you take the historic walking or audio tours, but if you'd just like to see weird, old buildings, then all you need to do is head over there and look around. The Main Post is surrounded by its original buildings, now full of nonprofits and small business, and the great lawn there hosts Off the Grid food trucks during the summer on Thursday nights and Sunday afternoons.