This California estate was either haunted by ghosts or the Marx brothers.

This hands-on math museum believes in turning concepts into constructs.

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

The legendary building that needed ghostly approval before being built.

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

A 50-foot tile mural mosaic for the 100-year anniversary of the Statue of Liberty.

A stellar example of Art & Crafts architecture, and a movie set to boot.

The artwork that Italians felt California didn't deserve.

A bigger-than-life pun that has become a beacon of altruism.

A hospital closed seemingly in the middle of operations, leaving behind fodder for horror films and ghost hunters.

Los Angeles's oldest cemetery allows visitors to trace the history of this proud city.

America's most famous piece of self-built architecture.

The only thing stranger than stumbling onto these philosophical musings is the story of the homesteader who created them.

Arcadia is home to a haven for nature geeks and 80s TV lovers alike.

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

The most unique castle in all of Southern California, entirely constructed from repurposed materials.

The ghostly remains of an accidental sea.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

Lemon Grove, California is known for its giant lemon...and mummified bodies.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

This San Diego museum, housed in a former Navy training facility, is dedicated to preserving women’s historic achievements.

A couple turned their front yard into an artistic masterpiece.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.