This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

These eerie outliers of the lightning bug family glow a mysterious blue color.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

This grand mansion has starred in everything from Bones to Buffy.

This glamorous old building is said to have inspired the Tower of Terror.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

A look into the Church of Scientology's deeply unfavorable view of psychiatry.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

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

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

Its buzzing collection honors vibrator history.

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

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

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

The legendary building that needed ghostly approval before being built.

A 140-year-old castle with underground caves hidden in San Francisco.

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

A gap in the concrete has been transformed into a miniature playground for the mind.

Centuries of biking history are nestled in the shadow of the birthplace of contemporary mountain biking.

A unique piece of graffiti offers a little slice of local history and mystery.

L.A.'s oldest operating bowling alley is a beautifully restored homage to its speakeasy days.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.