This castle has links to Portugal’s founding and struggles for independence.

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

The largest underground church in Europe.

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

The mummified relic of St. Antoninus.

Naturally preserved bodies are eerily staged throughout the crypt in varying poses.

Contains some of the world's more disturbing wax anatomical models.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

An ancient rogue artist community hidden next to one of the world's most glitzy and glamorous cities.

The location of the last witch trials of Italy, known as "The Salem of Europe."

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

Genoa's collection of over 4 million zoological, botanical, and geological specimens from around the world.

This cemetery features modernist statues as strange as its name.

The world's oldest bookshop still in operation.

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

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

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