The now-abandoned Fascist summer colony served a dark purpose during World War II.

The abandoned ruins of a failed resort hide on this verdant, picture-perfect island.

The oldest church in Mantua was buried for centuries under the facades of other structures.

It took more than 300 years to build this church, which is home to two sacred vessels believed to hold the blood of Christ.

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

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

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

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

A small island in Lake Garda that was used as a burial site, pirate hideout, and a monastery.

One of the world's largest murals covers a large swath of homes in its hillside neighborhood.

Since the 1960s, this small village has invited painters to decorate its walls.

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

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.

This abandoned, partly demolished building is now home to beautiful graffiti and murals.

One of the most remarkable caves in all of Iceland was created by a once raging river of lava.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

This canyon is comprised of gorgeous waters and magnificent basalt columns.

A Wes Anderson-esque lighthouse that boasts magnificent coastal views.

Inside this museum, visitors venture through ghost stories entrenched in Icelandic folklore.

This verdant, tree-lined Reykjavik graveyard is both enchanting and eerie.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

A "simple-hearted artist" turned an isolated Icelandic valley into his own art museum.