Hidden in the hills of Hollywood, this secluded Oz-themed garden is dotted with dozens of thrones.

The ghostly remains of an accidental sea.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

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

Its buzzing collection honors vibrator history.

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

An artsy hidden staircase leads to breathtaking views of San Francisco.

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

A vast city of the dead, where the deceased outnumber the living by more than a million.

The remains of a ruined mansion memorialize the 1906 earthquake.

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

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

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

A huge musical instrument played by the ocean.

A psychedelic labyrinth on the San Francisco bay.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

The largest drain hole in the world.

The only parking meter in the entire town, it is surrounded by 100 free spaces.

Once a place of peaceful repose, this sanitarium now faces an uncertain future.

A Masterpiece with a Tragic History.

An unfortunate geological resemblance to Satan has labeled this Pasadena gorge as a passage to the underworld.

Happy harbor seals frolic and snooze on this warm, sandy stretch of coast.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.