This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Manchester salvaged this sculpture of the adopted Mancunian when it was no longer wanted in Ukraine.

A tiny, hidden alleyway dedicated to the father of meteorology.

This Manchester laundromat is hiding something.

A beautiful maze marks where three countries meet.

A unrivaled and rather horrifying collection of wax dermatological models.

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

One of the oldest medical collections in Europe focusing on rare surgical instruments.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

France's most famous cemetery, with some of its most curious tombs.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This 600-year-old home seems to defy physics.

A simple tribute to the microscopic arachnid that gives its juices and its life to help make a speciality German cheese.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

A former ironworks that was the first UNESCO industrial site.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

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

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Most-visited and most-photographed slot canyon in the American Southwest.