A crumbling island fortress that seems to be covered in a field of stone crosses but is simply incomplete.

This folk museum is devoted to small figurines of provincial village life.

These blingy, baubled skeletons lie in glass boxes inside a baroque Bavarian church.

This popular pilgrimage site offers a hole filled with holy healing dirt.

Dolls of all shapes and sizes display the eras of femininity in this spooky and beautiful collection.

Tiny communists hammer away on the Olomouc Astronomical Clock.

A mechanized clock where a man fights off a dragon, crab, and rooster.

The hidden lair of an alchemist rediscovered in a 2002 flood.

A small collection of magic tricks and memorabilia is now an apartment-sized museum.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

A market for witches is hidden within a train station.

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

A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

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

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

A unrivaled and rather horrifying collection of wax dermatological models.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

Science fiction's grandfather has a fittingly marvelous tomb.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

An abandoned whaling station on an active volcano offers hot springs in Antarctica, surrounded by ruined giants of industry.

Fire meets ice at the southernmost volcano on Earth.