This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

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

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

If it wasn’t for a real estate agent with a penchant for old-school arcades, this hands-on collection of nostalgic flipper machines might never exist.

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

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

Built in 1899, this luxurious home was part of one of the first gated communities in Los Angeles.

This house turned museum chronicles the life and work of Richard Neutra.

This nondescript tunnel has been featured in a number of iconic movies, from “Roger Rabbit” to “Back to the Future.”

A black and white mural stands out from its psychedelic surroundings.

A free library to stumble across, one of many placed worldwide if you know where to look.

A 1950s Googie burger stand is now a Los Angeles landmark.

The decor of this Hollywood movie palace just barely predated the opening of King Tut's tomb.

This vintage car parts store is also a museum devoted to a squat little gem of automotive history.

Though the original building has been demolished, these massive bronze doors were saved.

Three vintage horses survived a 1976 inferno and found a home on a sister carousel.

Inside this clubhouse is a cinephile's paradise.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

These two monoliths have stood at the entrance to the neighborhood since the days it was called "Hollywoodland."

An iconic location along the Los Angeles River where countless movie scenes are filmed.

Friendships have been forged over ham and eggs every Wednesday morning for nearly a century.

A Cold War site complete with rusty structures, hiking trails, and beautiful views.

Rare collectibles from automated musical instruments to 250 unique automobiles.

This peaceful garden is hidden on the grounds of a spiritual organization founded by a pioneer yogi.