The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

An overlooked and unassuming engineering marvel.

A monument to the love people have for their pets.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

Inside an old airplane hangar, friends and strangers alike play on a massive trampoline.

Visible below the waves are memorials to the city's Gold Rush dead.

The remains of a ruined mansion memorialize the 1906 earthquake.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

Half of a house.

In this century-old literary safehouse, print is alive and well.

A hidden subterranean installation offers a view of the sky.

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

An invitation-only museum of items natural and bizarre, arcane and exotic.

A modern mechanical planetary system, part of a 10,000 year clock.

Floating man-made island and upscale restaurant.

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

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

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

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

An essential stop before plundering, BYO Cutlass.

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

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