A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

A semi-scholarly approach to sex.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

This Seattle joint serves food inside an old train car once used by FDR.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A creepy steel gremlin has protected the Bay Bridge since 1989.

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

A rococo retro-futurist future-rustic vernacular between yesterday’s tomorrow and the future that never was.

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

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

Floating man-made island and upscale restaurant.

Tiki luxury on Nob Hill.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

With the touch of a button, you can read a randomly selected short story.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

A hidden subterranean installation offers a view of the sky.

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

This shop specializes in oddities and Victorian-inspired wonders.

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

Early prototype for Frank Lloyd Wright's Guggenheim.