An ancient monastery, a locked room, and a mysterious book heist.

The floorboard scrawling of a tragic madman is on public display outside a Paris hospital, much to the dismay of its opponents.

Two small chapels housed inside an ancient tree.

The fantastic architectural models of a French traveler.

Monsters and miniatures are held in equal esteem at this wondrous museum.

An iconic and eccentric bar for "Manouche" Jazz music keeps expanding its space—and its influence.

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."

A unrivaled and rather horrifying collection of wax dermatological models.

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

In a boatyard near Aberdyfi is a nautically inspired work of art.

The remains of a small medieval chapel mark the legendary birthplace of the patron saint of Wales.

The world's smallest movie theater runs on solar power—an attraction in itself.

A real-life Professor Snape once taught in this Welsh university building, which students of course nicknamed “Hogwarts.”

Picturesque ruins once held off mighty armies.

The wreckage of an old coastal trading vessel is only visible at low tide.

This historic franken-chapel is the oldest wooden church in the world, at least part of it.

An English artist has turned an unassuming ex-council house into a time-lost house of mystery.

This historic abandoned train station looks like a stop for ghost trains.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The largest Roman amphitheater in the Balkans once held over 20,000 people, but managed to lay hidden for hundreds of years.