This innocuous-seeming building is actually the remnant of a major wartime brothel.

The artist and his brother are buried in a landscape straight out of a van Gogh painting.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

One of the greatest maze designer’s greatest mazes.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

Indents in the pavement are all that remain from a grisly death machine in Paris.

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

The oldest stone house in Paris was built by its most famous alchemist.

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.

In this brilliant blue spring in Germany, legend has it that a sad mermaid learned to finally laugh.

Joe Cocker's 1988 concert at this site in East Germany marked a changing sea tide that would eventually lead to reunification.

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

A small concrete monument remembers a German cold case involving incest, farm tools, and psychics.

Dancing skeletal figures pay homage to a medieval mural destroyed during World War II.

A spitting ode to a German serial killer.

From morgue to urn, watch the whole process at this unusual educational attraction.

A German town is growing a building out of trees.

This peculiar museum offers hands-on interaction with seemingly intangible principles of mathematics.

The world's biggest pet store.

This extremely narrow tenement boasts a maximum occupancy of just two.

King Ludwig I's collection of beautiful women.

The home of the morbid art of corpse plastination is open for visitors to view the fascinating, but stomach-churning process.