A Hungarian pharmacy museum with a box full of mummy powder.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

This cheese shop also houses a museum devoted to Dutch dairy.

An overgrown and largely forgotten cemetery lies hidden within the outskirts of Amsterdam.

A floating cat sanctuary on an Amsterdam canal.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

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

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

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

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

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

This massive library holds what was once the largest book collection in the world.

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.

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

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

The mystic whose incorrupt corpse still attracts the faithful.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

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

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

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

It's a mystery why these remains were found with no traces of their bodies in sight.