The first AIDS memorial chapel in San Francisco and one of only a few in the U.S.

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

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

Its buzzing collection honors vibrator history.

The only theatre in the world constructed specifically for sound movement.

A psychedelic labyrinth on the San Francisco bay.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

An 1870s ranch for pioneers, rodeo stars, and divorcees was abandoned and left for dead, until the city reopened it for exploration.

This institution collects the history of burlesque dancing with a titillating collection of ephemera and pasties.

A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

This massive geographical sculpture is so subtle, it's possible to pass by it without noticing.

Formerly frequented by Hollywood stars and now open for tours.

A picture-perfect town, perfect for blowing up.

A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.

This famous Nevada gold mine, once a hotbed of Wild West shenanigans, is now open for tours.