These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

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

When German-Iraqi relations broke down, this embassy was vacated post haste.

Concerts, art, offices, and a café in what used to be Berlin's first crematorium.

These brass bunnies honor the rabbits that dominated the no-man's-land around the Berlin Wall.

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

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

This curious Tudor-era castle was once home to Napoleon's greatest adversary, the Duke of Wellington.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

A defensive structure built during the Hundred Years War has remained useful in one way or another for nearly 700 years.

One of England's most famous churches hides a pair of little known architectural treasures.

Catacombs turned marketplace.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

At the very tippity-top of Europe is a cliff from which you can view the midnight sun.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

This floating sculpture of ice is a poignant reminder of nature's power.

This functioning parish church is also the site of many concert performances due to its wonderful acoustics.

Once part of an ancient international harbor, it's now an all-you-can-eat shrimp buffet for flamingos and other water birds.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

A decomissioned facility where the German "Transrapid" maglev trains were once tested.

Rusted structures stand like ghosts of Cyprus' 6,000-year-old copper industry.

A magical museum of fairy tale treasures near Cyprus' buffer zone.

This no man's land slicing through the island is strewn with abandoned relics of another time.