This dark, quiet forest on the outskirts of San Diego is dense with rumor and lore.

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.

This impressive tunnel was dug entirely by hand over the course of 36 years.

The liveliest ghost town in the state.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

Abandoned hotel with adjacent lake and golf course.

The ghost town that ended up on Ebay.

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.

Hundreds of trees made from glass bottles make up this forest on Route 66.

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

Abandoned bridge hidden deep in the San Gabriel Mountains.

A small medical museum with a recreated doctor's office.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

This temple, built by an eccentric religious leader before his death, sits guarded and in ruins.