Over 3km of caverns and caves at the Switzerland-France border contain the largest underground river in Central Europe.

Museum dedicated to wax representations of disfiguring diseases.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

These spooky and unusual stone formations create an underworldly landscape.

One of the world's largest collections of pharmaceutical artifacts.

Lucerne's central prison was converted into a tourist hotel with a bare minimum of changes.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

A historic observatory precariously perched at the "Top of Europe."

This simple apartment may have inspired some of the most important theories in the history of science.

Caves famous for the dragon-slaying saint who lived there.

The astonishing collection of an infamous criminologist.

A fake medieval village in the middle of Turin.

David Sedaris called it "The greatest shop in the world."

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

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

Weird wax anatomical models reside here, as do other anatomical specimens.

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

A museum of magic with a Sadist past.

Dedicated to the art of hunting, with juxtapositions of contemporary art.

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

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

"In the Dark" Restaurant in Paris offers dinner in complete darkness.