Berlin's old airport.

Super-heavy Nazi architectural experiment.

A cluster of headless, armless sculptures looms within a popular Polish park.

An impressive monument to Poland's independence.

The last king of Poland was interred in this church nearly 200 years after his death.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

These 18th-century paintings of Warsaw were used to reconstruct the city after World War II.

This enigmatic artifact is a rare depiction of an ancient Iberian noblewoman.

An iconic and controversial ancient Iberian funerary urn with a hauntingly penetrating gaze.

An ancient Egyptian temple in the middle of Madrid, Spain.

Metro station with a claim to rock n' roll fame.

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

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

One of the world's heaviest musical instruments towers within a popular urban park.

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

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A lush indoor jungle fills this bustling Madrid transportation hub.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

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

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.