This stunning sea creature-shaped home blends into the landscape like a fantasy villa.

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

Commonly referred to as the most photographed Victorian home in the United States.

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

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

The site of murders and Satanic cult gatherings.

A storybook European village in Berkeley.

Travelers exchange letters with woodland creatures at this mini post office.

Abandoned bridge hidden deep in the San Gabriel Mountains.

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

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

San Francisco's newly reopened hands-on science museum.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

Its buzzing collection honors vibrator history.

A psychedelic labyrinth on the San Francisco bay.

Step back in time at this 1950s display home, built to showcase once cutting-edge electric amenities.

A remarkably opulent mansion with a tragic history.

This abandoned prison castle has become an imposing gallery of graffiti art.

A whimsical tower with a spiral staircase, inspired by the Space Age and the Möbius strip.

A look into the Church of Scientology's deeply unfavorable view of psychiatry.

The private clubhouse for the members of the Academy of Magical Arts.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.