The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

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

The stone walls of a home built to withstand a California wildfire still stand after more than a century.

Once a place of peaceful repose, this sanitarium now faces an uncertain future.

This mysterious and creepy location instills a strong sense of foreboding in all visitors.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

The site of murders and Satanic cult gatherings.

The Citrus Variety Collection at UC Riverside contains two trees of each of the 1,000+ varieties of citrus.

An unexpected and peaceful oasis on a hillside.

The Route 66 institution that inspired Taco Bell also served as an important headquarters for Mexican-American social movements.

Explore an early California pioneer's rancho hidden in LA's manufacturing hinterland.

A tribute to the disposable cups that were once manufactured here, this 68-foot-tall statue would be difficult to throw away.

“It's the quality” (but probably also the drive-through donut tunnel) that has attracted diners since 1968.

These structures were inspired by both Native American shelters as well as, strangely, an ice cream shop.

Mexican food and folk art.

This California tree is the single source of the state's entire orange industry.

The helicopter that "Tricky Dick" absconded from the White House in on his last day in office.

Abandoned bridge hidden deep in the San Gabriel Mountains.

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

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

A shockingly detailed small scale recreation of the temples of Abu Simbel.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

This 19th-century prison once held Irish revolutionary Constance Markievicz, writer Frank O’Connor, and a nine-year-old pickpocket.

Legend holds that the Ancient Greek goddess of love once bathed in the waters of this grotto.