A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The world's largest wooden structure.

Stunning Roman aqueduct used for 1900 years and still standing.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

Amsterdam's Red Light District leaves little to the imagination.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

Fantastic views and thousands of love locks.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

This lurid German fountain plots the sad course of marriage from dating to death.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

Striking occult iconography on a medieval German church.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.

Tiring of digging out the door to this church for every service, it was eventually abandoned to the sands.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

This modernist tower was saved by a fraternity with a 500-year-old penchant for shooting at wooden parrots.

Iron Age "bog person" preserved for over 2,300 years.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

Nordic giants resurrected from the sea and restored to their former greatness.