The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

A pair of connected skyscrapers form this symbolic gateway.

This historic timepiece is thought to be the only public clock in the world that keeps lunar time.

Oriental bazaar in the heart of Sarajevo.

Take a cruise with no movement but plenty of style in this one-of-a-kind boat mall.

130 replicas of world wonders squeezed into just 118 acres of space.

The most famous location in China was home to whole dynasties worth of imperial rulers.

2300-year-old Roman road connecting the empire.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

Go inside to really appreciate this 500-year-old technological masterpiece.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

Time has been frozen at this station since the bombing in 1980—or so it was believed.

A large statue of Pope Gregory XIII in Bologna was disguised as Saint Petronius to avoid destruction.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

A fake medieval village in the middle of Turin.

The astonishing collection of an infamous criminologist.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

In this museum, visitors are invited to touch the art.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

This massive underground salt mine now holds a sci-fi theme park in its depths.

This Transylvanian church has changed its denomination four times.