The mystery of the Putim Ossuary involves a tricorn hat.

This sublime architectural marvel is a rare example of an expressionist church.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

A medieval stronghold rising over the ruins of ancient Roman villas along Rome's southern coast.

Knights Templar are visible inside this stunning Cistercian abbey.

Its look is severe, but its location, isolated on a hill in the middle of the countryside, is particularly scenic.

This historic floating crane became an unlikely symbol of the port of Trieste.

This entire town moved to a safe location after it was devastated by an earthquake, but the remains of the original town are still around.

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

Giant, pink stuffed rabbit on an Italian mountain.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

An old watchtower from the 16th-century now watches over sulfur springs and one of Lazio's last coastal woodlands.

Over 100 artworks are painted on the walls of this town, making it an open-air museum of contemporary art.

The largest civilian satellite control center in the world is located in the middle of a drained lake.

These ruins on Mont Tantané dates back to the Iron Age, but there is limited evidence for why a village was built so far from water or other resources.

This abandoned semaphore station hearkens back to the days of the optical telegraph.

This stately palace, first built in the 16th century, was converted into a prison in 1830.

One of the few places of its kind, this space research center sits deep in the countryside of Matera.

This ancient city was home to one of the greatest schools of Greek philosophy.

During World War II, a number of important sculptures and paintings were moved to this castle for safekeeping.

An abandoned piece of phallic art repurposed by locals into a makeshift fertility shrine.

A never-inhabited village that was built as part of Mussolini's agricultural reforms.

A fossil of a 30 million-year-old fish is unexpectedly hidden thousands of feet above sea level.

An unusual sculpture with a meaning shrouded in mystery.