A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

An eerie, derelict amusement park in Berlin.

An exquisite tunnel of cascading flowers.

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

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

A magical place that lets you play in and explore the world of Studio Ghibli.

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

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A church of bones, decorated with 40,000 human skeletons.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

A terrific purveyor of natural history objects and curios.

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

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

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

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

A trailblazing sovereign nation tucked in the American state of Wisconsin.

An oddly poignant roadside attraction celebrating American folklore.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

A tribute to the twin ideals of religion and patriotism, built by a Catholic priest from rocks, glass, and innumerable found items.

One extremely determined man's homemade universe.

Once a speakeasy operated by Al Capone, this Milwaukee cigar bar is now a haven for ghost hunters.