An antique store houses the last operational diner from the defunct department store chain.

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

An ancient quarry rediscovered by a dog and claimed by biblical kings, a German cult, and the Freemasons.

This hilltop park offers magnificent views and a Frank Lloyd Wright masterpiece.

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

Historic funicular railway, believed to be the shortest railroad in the world.

A visionary, futuristic sculpture in Los Angeles that never met its extraterrestrial potential.

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

The beautiful 1920 Pantages Theatre remains hidden just underneath the LA Downtown Jewelry Exchange.

The legendary building that needed ghostly approval before being built.

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

Thanks to the building of a life-giving reservoir, part of the Great Wall of China is now a dive site.

The skyline of Montreal includes the silhouette of an unexpected fruit-shaped Canadian staple.

This working replica of the 'Friends' coffee shop is more accurate to the show than the set itself.

Beijing's expansive subterranean hiding spot now crumbles away as a tourist destination.

The timepiece that exonerated a labor radical accused of a parade bombing that killed ten people.

Forgotten German bunkers in China create a sharp cultural contrast.

The rusting remains of the largest assembled WWII fleet on the West Coast.

A miniature view of the park, caught in time.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

A 300-ship graveyard, with a few still visible at low tide.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

A winding path built in secret on the edge of the continent.