Natural history museum celebrating biodiversity with a parade of taxidermy animals.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

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

This museum houses an imposing skeleton army comprised of creatures great and small.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

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

Paris' fabled purveyor of exotic taxidermy and natural history curios.

The beautiful baroque library of the Hapsburg empire.

How did a French journalist’s grave become the sexiest statue in the cemetery?

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

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The Habsburgs' royal collections of art and wonders.

Two stunning 17th-century libraries and a cabinet of curiosities.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.

Real bones which are said to have belonged to a Polish dragon.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

The most visited, and possibly most controversial, museum in Germany.