Urban explorers embraced America's now demolished first suburban mall, south of Chicago.

Furniture tries to escape an abandoned building in San Francisco.

An invitation-only museum of items natural and bizarre, arcane and exotic.

This shop specializes in oddities and Victorian-inspired wonders.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A huge musical instrument played by the ocean.

A hidden subterranean installation offers a view of the sky.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

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

One of the deepest indoor swimming pools in the world.

18th century underground pilgrimage site, dedicated to a Saint that did something...

César Baldaccini's iconic sculpture of a 40-foot thumb stands tall in La Défense.

The only remaining collection of flayed figures made by French "madman" Honoré Fragonard.

Skeletons, medical artifacts, and other obscure and precious treasures all displayed in a wooden pharmacist's cabinet.

Inside a former cabaret, seven floors of erotic art.

A Belle Epoque bordello turned into a themed love hotel.

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

A font of vintage porn on the silver screen.

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The celebrated eyesore created by starry-eyed sweethearts.

It specializes in outsider art and artifacts of secret societies.

Cockroach Museum features roach celebrities and live hissing cockroaches.

DIY collection of eclectic holdings.