Two distorted Romanesque columns hold aloft a mine cart in honor of laborers who died during WWII.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

The stunning interior of this Gothic church is covered in ornate gold details.

Hundreds of notes give thanks to the patron saint of lost causes.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

The final resting place of more than 200,000 people, this is one of the largest cemeteries in Europe.

This bell stars in a tragic love tale and is said to make wishes come true.

A statue honors the children who fought Nazis in Poland.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

This facility has manufactured stunning tapestries for France's royalty ever since the 17th century.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

Former hunting lodge of a duke who was an avid collector of impressionist works.

The oldest and smallest cemetery in Paris is only open to the public twice a year.

Saintly bones pressed into a wax effigy of a Catholic superstar.

This little-known relic crypt holds stolen parts of a Roman Empress.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

The headless bodies of more than 1,300 guillotined victims of the Reign of Terror are buried here in mass graves.

BDSM, 1930s Style.

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

Hidden away in a modern library are the remains of one of the 18th century's most celebrated wunderkammers.

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