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

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

One of the largest squares in Europe contains an entire artificial island.

The oldest botanical garden in the world that technically isn't the oldest.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

The world's oldest surviving anatomical theater, where "the dead are pleased to help the living."

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

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

One of downtown Berlin's last reminders of its Communist past.

A 12th-century fortress containing some of Berlin's oldest buildings.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A fascinating insight into daily life in the Eastern Bloc.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

The most visited, and possibly most controversial, museum in Germany.

This humble resting place belongs to one of history's most celebrated restaurateurs.

A historic bridge with a lovely acoustic anomaly.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

An ordinary lamppost situated in the middle of Cambridge has an unusual moniker and history.

One of the last remaining movie theatres in the country that features a rear-projection system.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.