This Pringle-shaped ledge makes for the perfect photo op.

A "haunted" landmark on the coast of Southern California.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

This former stomping grounds of the most eminent astronomers of the early 20th century.

Abandoned bridge hidden deep in the San Gabriel Mountains.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

World War II-era Nazi compound nestled in the Santa Monica hills.

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.

"Only the devil could play golf here."

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

A Biblically-based Natural History Museum.

A bronze statue dating back as far as 1252, still has remnants of gold on its right cheek from ancient gilding.

World's largest collection of serial killer artwork and other macabre exhibits.

One of the best collections of antique printing machinery in the world.

The library of every book lover's dreams.

The final resting place of a space program monolith, soon to be unveiled again to the public.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Oldest building in California still in use.

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

Erotic art covers the walls of the largest ancient pleasure palace.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

The topiary maze at the Habsburg hunting lodge.

Mozart's skull may be held in this collection, but definitive proof continues to elude scientists.