This large midwestern cavern features impressive rock formations and an underground waterfall.

This stately structure has been abandoned for half a century.

This graveyard is the eternal home of the residents of a vanished California town.

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

The site of murders and Satanic cult gatherings.

A museum dedicated to restoring vintage aircraft, located at a working airport.

It's not your typical library, memorial, or book store.

Centuries of crashing waves carved out this small hole in the rock, which lights up at certain parts of the year.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

This cabin from the 1850s is one of the first structures built by Chinese immigrants in California.

Haunting and beautiful trees, doomed to die.

This lonesome Monterey cypress has survived centuries of wind, salt, and at least one attempt at arson.

This remarkably simple jail went over a century without an escape.

The oldest lighthouse on America's west coast no longer needs keepers, yet they maintain the site anyhow.

Once America’s most beautiful army base, this abandoned military fort on the coast of Monterey Bay has been left to the elements.

It should come as no surprise that the world's largest artichoke lies in the town that calls itself the "Artichoke Center of the World."

An abandoned boat that's been stranded mysteriously for decades.

At this California chicken ranch, four bucks will get you 18 eggs and a chorus of dancing animatronic poultry.

A New England-style lighthouse along California's beautiful Highway 1 gets a re-do.

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

Elephant seals and sea lions have turned the abandoned buildings on this island into their endangered love shack.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

Abortion, prohibition, religion, war, and fear all play a part in the history of this idiosyncratic Pacifica castle.

Part mural and part sculpture, this work of art sits in the middle of the Promenade, as if swimming in a river of asphalt towards the ocean.