An "anarchical" no man's land, complete with garbage sculptures and a hobo-run "Landfillian Library."

A porcelain company's former dumping ground, completely covered in pieces of collectible ceramics.

Concrete strongholds stand guard over the Golden Gate.

9,000 square feet of vintage and modern mechanical toys, dioramas & sideshow curiosities.

Where a staggering 747 ships were constructed during World War II.

Abandoned landscape once home to "the world's largest winery."

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

The oldest Naval cemetery on the West Coast.

The perfect spot for a picnic, right next to a giant ballistic missile.

The former Naval shipyard is open for exploring - mostly.

The southernmost outpost of the Russian Empire in colonial America.

This abandoned boat was left in place thanks to its rotting beauty.

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

Massive prehistoric mammals used these stones as oversized scratching posts.

A huge work of Burning Man-inspired outsider art on the grounds of a California winery.

A sculpture dedicated to Napa Valley's oldest mineral water company.

California's own majestic geyser is powered by a subterranean volcano.

This historic California cemetery holds the bodies of veterans of both the Civil War and the Donner Party.

The haunting ruins of Jack London's dream house.

The fossilized remains of ancient California redwoods.

A tribute to one man's legacy of improving the accordion's reputation.

Monumental sculptures of Patrick Amiot, constructed from debris, detritus, and determination.

Nursery with extensive collection of flesh-eating plants operated by the author of "The Savage Garden."

A tribute to the life and work of the beloved "Peanuts" cartoonist.