A series of abstract, silly sculptures represent the works of a great modern classical composer.

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

This cubist Vienna church building looks like some sort of alien stonehenge.

A garden in Lisbon filled with giant porcelain creatures.

The location of the last witch trials of Italy, known as "The Salem of Europe."

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

A remarkably intact castle that once was the largest in Ireland.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

Commonly acknowledged as the only public monument to the Devil himself.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

This automated sculpture of two men peeing will spell out text messages with their micturition.

Op-art architecture designed for happiness.

A mocking tribute to the past and modern leadership of Prague.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

Pilgrimage site for star-crossed lovers.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

A scattered trail of street art adds a pop of color to the city's stark structures.