The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

How did a French journalist’s grave become the sexiest statue in the cemetery?

A Belle Epoque bordello turned into a themed love hotel.

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

This bridge was constructed from the rubble of the infamous Bastille.

BDSM, 1930s Style.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

More than 5,000 artifacts donated by the people of the city, plus a room entirely devoted to the band U2.

A nun spent 16 years painting the stunning Celtic mural that covers the interior of this WWI memorial.

Banksy gives themself artistic license with this piece of London street art.

A kaleidoscopic warehouse-maze of handmade neon signs.

A Milanese café entirely designed by the American director Wes Anderson.

The secret medieval communication system will whisk your words above the noise of the crowd.

This curious building hides eclectic details like medieval gargoyles alongside naked angels and Art Nouveau mosaics.

A temple to modernity, tucked away amid Barcelona's more well known museums.

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

Taste the white whiskey that the United States' first president once distilled and enjoyed.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

This abandoned mansion has a window for every day of the year, and is a temple for ghost hunters.

This small chapel is built of human bones and decorated with a golden skeleton.

One of the best collections of wax anatomical models in the world.

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.