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

A herd of 150 bison live on California's Santa Catalina Island and are at the heart of an ongoing debate between environmental protection and economic expansion.

Explore 10 acres of environmental sculptures.

Oldest building in California still in use.

A Biblically-based Natural History Museum.

Not truly a ship nor a building, the Navy's first and last "landship" is now abandoned due to clerical issues.

San Diego's most historic and haunted home.

An inconspicuous footbridge beloved by San Diego locals.

Swarms of butterflies cannot compare to the awe inspired by the publicly-funded nakedness once displayed in this sunken garden.

North America's largest accredited model railroad museum.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

The king of U.S. high points towers over every other peak on the continent.

The remains of the great moral philosopher reside in a university in London.

An vast warehouse of everyday treasures in Berkeley, CA.

An extraordinary final resting place full of oversized art, amazing statues, and dead celebrities.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Quite simply the largest tree in the world (by volume).

Lucha Libre (Mexican Wrestling) themed taco shop.

San Francisco's newly reopened hands-on science museum.

Medical and zoological curiosities for sale.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

This brightly made over hotel hides decades of suicide, serial killers, and mysterious deaths.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.