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

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

A psychedelic labyrinth on the San Francisco bay.

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

A huge musical instrument played by the ocean.

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

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A 140-year-old castle with underground caves hidden in San Francisco.

New York's oldest magic store.

Tucked in the back of this amazing antique store is an important piece of medical history.

The legendary building that needed ghostly approval before being built.

World's largest collection of serial killer artwork and other macabre exhibits.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

An archive of nearly every day of Buckminster Fuller's life.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

Palace where the nearly un-killable Rasputin was murdered.

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A Spanish-style estate that has traded black ties for rock concerts.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Years of archaeology, just chillin' by the water cooler.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

One man's swirling six-acre monument of stone.