This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

This massive redwood tree has a hole in the base big enough to drive through.

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.

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

A 300-ship graveyard, with a few still visible at low tide.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

An inconspicuous footbridge beloved by San Diego locals.

This grand mansion has starred in everything from Bones to Buffy.

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

Eons old volcanic activity created one of the most stunning rock formations in the United States.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

"Looks so real, it's scary!"

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

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

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

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

A meditative space out of a fantasy story.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Quite simply the largest tree in the world (by volume).

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

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

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.