This antique prison is a tourist attraction with a sordid past.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

A museum honoring Germany’s cucumber mecca offers a great dill of gherkin history.

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

The steepest classic funicular in the world glides along a dizzying incline.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

Florida castle built with aluminum printing plates.

The ruins of a Florida miracle spring resort make it seem like a wonder that this was ever a health spa.

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

Crumbling ruins of the thermal baths that once attracted royals and aristocrats from throughout Europe.

Hidden beneath the streets of London is a secret subway that only carried mail.

An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Abandoned medieval hill town.

Giant, pink stuffed rabbit on an Italian mountain.

The great Danube river starts here.

Three-story concrete ram with a permanent gift shop.

Dentist's hated concrete colossi are now beloved icons of the community.

Abandoned bridge hidden deep in the San Gabriel Mountains.

This tiny little island has, as the name says, just enough room for its single house.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.