A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A miniature view of the park, caught in time.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

A 300-ship graveyard, with a few still visible at low tide.

Tenacious mummies survived dental problems, eternal entombment, and more than their fair share of devastating fires.

Home to one of the world’s largest collections of model yachts.

A 140-year-old castle with underground caves hidden in San Francisco.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

The remains of a 12th-century chapter house in Golden Gate Park.

A free, public museum dedicated to the fascinating science of sight.