This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

No matter what it might seem like on film, most scenes filmed on a plane are filmed at this LA studio.

San Diego's most historic and haunted home.

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

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

The programmatic glory of LA's giant whiskey barrel building has become an upscale reminder of the city's kitschy roadside past.

A meditative space out of a fantasy story.

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

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

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

Tiki luxury on Nob Hill.

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

A hotel and restaurant serving as the mecca of kitsch.

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

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

A strange house built only at night, with rumored mystic inspiration.

A library of rare occult books in Los Angeles.

Its buzzing collection honors vibrator history.

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

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

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

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