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

A decommissioned Naval base now rents itself out for people who want to blow stuff up.

A pier that used to act as a busy ferry dock is now a decaying favorite of local fisherman and urban artists.

Once the largest winery in the world, this castle-like building now sits abandoned on the San Pablo/San Francisco Bay shore.

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

A strange house built only at night, with rumored mystic inspiration.

Secret Manor, a house full of legends, the least of which is the haunting of long-deceased ladies of pleasure.

One of the ghostly stops along Route 66.

The liveliest ghost town in the state.

A long-vacant Scottish Rite temple in Hollywood has been converted into an art museum filled with Masonic relics.

Another of California's unused Cold War missile defense complexes has become a graffiti gallery.

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

Hidden beneath a lake for decades, this brutalist mine has now emerged from beneath the receding waters.

A crumbling wizard is one of the final reminders of a roadside Middle Earth.

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

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

An ominous concrete cube cuts a dystopian silhouette atop this California mountain.

An abandoned 1920s-era stretch of cabins now overshadowed by the 66 Motel.

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

A small horde of mythical creatures lurk almost imperceptibly within the museum's wildlife dioramas.

Rather than a run-of-the-mill franchise hotel, this lodging has been decked out in dinosaur decor.

This statue of an obscure comic strip hero stands as a tribute to patriotic service and a cautionary tale about embracing fads.

The burial grounds of a secret society includes fences topped with fake Tesla balls.