Terrifying derelict military hospital once housed a recuperating Hitler.

This former Soviet military base has over 10 original aircraft and an enormous amount of memorabilia on display.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

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

You've probably seen these distinctive orange-tiled columns on the big screen.

Known simply as "The Hand," this famous public sculpture in Berlin was featured in a Depeche Mode music video.

An old tram depot transformed into a vintage car paradise.

The non-native bovine herd was brought in to help conserve these Berlin wetlands.

A sweet museum focused on beets.

Once a path for Jewish funeral processions, this unassuming alleyway is rich in local lore.

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.