The best place in the world to buy tinned fish.

One of the smallest bookstores on the planet.

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.

The world's oldest bookshop still in operation.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

A garden in Lisbon filled with giant porcelain creatures.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

The sunken structure looks like the victim of a catastrophic flood.

An oddities shop packed with twisted treasures inspired by Oscar Wilde and Edgar Allan Poe.

This gnarled old tree supposedly sprouted from seeds kept in the pocket of a 16th-century Spanish sailor.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

A surreal museum of extraordinary industrial objects.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

A hospital where antique dolls are given new life.

This Minnesota town celebrated the state's 100-year anniversary by creating a massive ode to nature's smartest bird.

The shell of a medieval fortress offers commanding views of the area it once protected.

A gigantic sculpture garden is packed with innovative oddities.

An open-air museum in a mountain valley features works designed to blend in with—and disintegrate back into—their natural surroundings.

The Icelandic Sea Monster Museum explores the area's history of aquatic cryptid sightings.

This ancient Hindu temple is covered in thousands of colorful statues and has a long mythological history.

A county library in rural Ohio houses one of the finest mineral collections in the world.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A church of bones, decorated with 40,000 human skeletons.