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

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This medieval city gate is now a blend of the past and the modern world.

A surreal botanical garden with an even more surreal tour guide.

The relics of dozens of martyrs are stored in a single chapel.

This Neapolitan exhibition hall grants weird and wonderful insight into the intricacies of human biology.

A rococo room covered entirely in porcelain originally constructed for another royal residence.

An eerie, little-known Neapolitan museum filled with preserved human remains.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

Continuing the tradition of the dime museum in style.

The building where Mary, Queen of Scots was said to have bathed in white wine.

The world’s first museum dedicated to the history of childhood opened in Edinburgh in 1955.

This Scottish museum is the only one in the world to focus not on one religion but all of them.

Glasgow’s piece of the patron saint of love.

The most loyal of little dogs, or a Victorian era publicity stunt?

Protecting the dead from opportunistic body snatchers.