The only surviving piece of Copenhagen's 16th-century defensive wall.

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

Tiny memorials honor individual victims of the Holocaust.

Berlin's beloved bear is immortalized at the Museum für Naturkunde.

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

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.

Berlin's old airport.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

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

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Where once there was a train station bathroom, there is now this German burger joint.

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

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

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

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

A surreal museum of extraordinary industrial objects.

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

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

World War II ended before these tunnels built to protect vital oil from Japanese bombs were ever used.

A colorful street named for the legendary Australian rock band.

This sublime architectural marvel is a rare example of an expressionist church.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.