The entire length of the border is marked by a 20-foot-wide slash through the trees.

A one-of-a-kind collection of a unique medium.

Coastal dunes, site of buried Egyptian movie set and former utopian colony.

The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California."

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.

Abandoned hotel with adjacent lake and golf course.

This odd California folly seems like it was almost designed to accumulate urban legends.

The largest permanent Monopoly board makes one of the longest games even bigger.

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

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

A hand-built folk art installation covered with messages of God's love.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

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

Megachurch turned Catholic church comprised of 10,000 glass panes.

The L.A. Zoo has a secret garden of rare bootleg cycads, a palm specimen dating back 280 million years.

In the middle of the desert, miles from any human life, sat an anomalous pay phone that still magically answers your calls.

A former utopian healing center created by a huckster and built by derelicts.

Get up close to emus and ostriches, or buy their tasty meat.

An alley covered with 20 years of bubble gum.

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

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

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

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