Notorious artist squat renovated into legal studios.

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

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

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

Abandoned railway line circling the city of Paris.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

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

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A layered tribute to the work of mosaicist Isaiah Zagar.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

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

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

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

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

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

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

An emerald-green grotto just a short trip from Austin.

An eerie, derelict amusement park in Berlin.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.