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

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

The first declared National Monument in the United States.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

The rocks in this arid basin leave trails of movement behind them.

One man's homage to the sun continues to grow like a glass fractal.

Resting place of Hollywood's immortals is also site of summer film screenings.

America's most famous piece of self-built architecture.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

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

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

An artsy hidden staircase leads to breathtaking views of San Francisco.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

The secret city built by the Manhattan Project.

This replica of the Greek structure is in the heart of Nashville.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.