This automated sculpture of two men peeing will spell out text messages with their micturition.

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

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Macabre astrological automaton clock dating to the late 1400s.

A museum of carnival attractions where you are invited to ride the rides.

A complex, nine-layer maze on the grounds of a Venetian doge's playground.

A museum of magic with a Sadist past.

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

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

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

A font of vintage porn on the silver screen.

Where the high court feasted, frolicked, and high courtesans put their royal lovers' diamonds to the test.

A haunting collection of the vanished and disappearing natural world.

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

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.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Inside a former cabaret, seven floors of erotic art.

A walk through the historic city center, under the streets of Seattle.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.

Seattle's own bad art museum located inside Cafe Racer.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.