The relics of one of Jesus' 12 apostles are enshrined in this Italian Basilica.

This spaceship sculpture in the middle of the Slovakian capital looks like it just crash-landed.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

An abandoned Roman salami factory has found new life as an art space home to 200 squatters.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

This hidden Art Nouveau courtyard is an opulent feast for the eyes.