Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

Yugoslavia's biggest underground airport lies in ruins.

A formerly opulent Italian village is now a crumbling ghost town that no one really knows what to do with.

On rare days, this abandoned castle's gatekeepers open its doors, revealing the eye-popping splendor hidden inside.

Giant, pink stuffed rabbit on an Italian mountain.

A former mining village that now operates as an open-air museum.

This site marks the oldest known settlement in Campania, inhabited around 9,000 years ago.

The ruins of a thousand-year-old hermitage are tucked away deep in the sloping forests of Albano Lake.

A masterpiece of modern architecture that caused quite a stir in Paris, recreated in Bologna half a century later.

This decaying complex from the early 1900s was once the site of massive iron and fluorite mines.

An abandoned building that once tightened a power line that stretched across Messina Strait.

This long-abandoned village sits across a narrow gorge from a still-inhabited settlement that was once its twin.

In Lago Superiore, the largest expanse of lotus flowers outside of Asia is hard to miss.

A town saturated in Italian rationalist architecture was once marshland drained by Mussolini.

One of the oldest and most significant collections of Ancient Egyptian archeology outside of Egypt.

Wandering this ancient burial place offers a glimpse of the afterlife in the fresco-adorned tombs of an ancient Etruscan civilization.

Italy's only urban waterfall has enchanted artists and travelers for centuries.

An abandoned village that resides along the mountains of the Aosta Valley.

Once home to one of the oldest banks in the world, this building is also where Marco Polo's famous travelogue was written.

Though an earthquake destroyed this village in 1980, one former resident still walks its streets every day.

This Italian ski resort rose to fame when Benito Mussolini was held prisoner there and then rescued by the SS.

A medieval house with mysterious alchemical inscriptions on its facade