Fortified medieval tower house with lovely roof garden.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

A local student's chance encounter with Keith Haring led to the creation of one of Europe's largest murals.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

An officers prison camp believed to be impregnable by the Germans saw over 30 successful escapes.

A restaurant and observation deck built in a unique broadcasting antenna.

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

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

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

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

A fascinating insight into daily life in the Eastern Bloc.

Macabre astrological automaton clock dating to the late 1400s.

Gargoyle head that brings good luck.

Fake subway tiles were installed to cover a design that resembled the Confederate flag—it's unclear if the resemblance was intentional.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

An ancient knight and a symbol of the city's freedom.

The UK's oldest theme park slowly slips away.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

This former abandoned hospital, a complex of stunning 19th century buildings, once housed 2,000 psychiatric patients.

The forest that inspired Winnie-the-Pooh's Hundred Acre Wood can be found outside London.

This 2,700-year-old woman is the jewel of the Maidstone Museum's Egyptian collection.