This former New Jersey bus now exists as a public art exhibit.

An eccentric millionaire's personal curio collection includes at least one shrunken head.

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.

This lighthouse has been guiding shipping into the Golden Gate since before the American Civil War.

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.

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

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

A modest reminder of treacherous waters at the Golden Gate.

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

A winding path built in secret on the edge of the continent.

A masterpiece in Golden Gate Park by virtue of the artist’s debt.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

San Francisco's first World's Fair, dedicated to the wonders of California.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

San Francisco’s condensed garden of incredible plant growth.

This turn of the century masterpiece has a mysterious goaty interloper.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

Standing in for the first ship to navigate the Northwest Passage.

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.

A miniature view of the park, caught in time.

The key to turning shifting dunes into the green oasis of Golden Gate Park.