Super-heavy Nazi architectural experiment.

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

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

A collection of abandoned typographic signs from Berlin and beyond.

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

A wunderkammer of mysterious objects and stories.

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

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

Started as a kitchen garden, now the second largest botanical garden in the world.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

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

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

These elaborate gothic monuments honor Verona's medieval lords.

Pilgrimage site for star-crossed lovers.

Not far from the more famous House of Juliet, visitors will find the supposed residence of her lover.

This chimney is the oldest free standing industrial chimney in Britain.

Designed to resemble foreign architecture, this mosque-looking structure was used to pump water to a royal fountain.

Warm water springs inside an astounding canyon.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

This historic hiding place, often used by people escaping slavery, is a testament to a heroic struggle for freedom.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

This old army installation has worn many hats throughout its history.

These figures float and flutter in this fountain crafted by famed Swedish sculptor Carl Milles.