The personal library of the founder of modern neurology is open to visitors.

A magical, macabre wax museum, beloved by locals, uses real artifacts to depict an assassination from the French Revolution.

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

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

A museum dedicated to linguistics, from how babies learn to talk to endangered and extinct languages.

Statue of death tucked in the University of Medicine courtyard.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

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

The south aisle of this church once served as a burial vault.

A prison with a more than 200-year history.

An unlikely connection between a little English town and the most famous brand of American motorcycles.

Austrian and Germans who died on British soil during World War I and II are buried here.

A churchyard in Ardsley houses a memorial dedicated to the victims of England’s worst mining disaster.

This local celebrity earned his fame by doing a job no one else dared.

The father of Belfast medicine is buried in the graveyard of this 13th-century church, which now lies in ruins.

The grounds of this Catholic boarding school are said to have inspired Arthur Conan Doyle and J.R.R. Tolkien.

Inside this reclamation yard is a unique collection of horse-drawn vehicles.

Did the legendary Scottish knight William Wallace actually take refuge here after a major battle?

An eccentric memorial garden to the "warrior" birds of World War I, the messenger pigeons used by the Allied forces.

The ruins of a small church belonging to a powerful Scottish family still hold the remains of its patriarch.

This small crenelated building was built by a British aristocrat who supported the American Revolution and may have named it in memory of a pivotal battle.

This 19th-century Turkish bath house survived the Blitz of London and is now an events venue.

An 800-year-old island castle in Guernsey's main harbor.

This church is said to have connections to the Knights Templars.