This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

Sail in for a ’dam good slice.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

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

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

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

The recovered bones of martyrs slaughtered during The Terror are on display in this church crypt.

Skeletons, medical artifacts, and other obscure and precious treasures all displayed in a wooden pharmacist's cabinet.

Pitié-Salpêtrière was the dumping grounds for women who received the dreaded diagnosis of "hysterical."

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

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

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

A haunting collection of the vanished and disappearing natural world.

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

Christ's blood preserved in a Belgian town.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

France's national museum of scientific and industrial instruments.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

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

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

A subterranean shelter remains intact under a busy Paris railway station.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.