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.

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

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

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

Inside this Jewish cemetery is a memorial to soldiers who deserted the German army and were executed.

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

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

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

Cold war icon and onetime "hole" in the iron curtain.

Reminders of the Battle of Berlin still scar the railway.

A haunting contrast of trains that both saved and took the lives of Jewish children in Nazi Germany.

Largely overlooked, this little fountain on Museum Island is a whimsical tribute to a Prussian king nicknamed the “Fatty Flounder.”

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

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

The skeletal frame of a decommissioned gas-pumping station offers breathtaking views of greater Berlin.

One of the oldest cemeteries in Germany was originally used for victims of a cholera epidemic.

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

Art installations, derelict railcars, and endangered grasshoppers all call this south Berlin park home.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

Started as a kitchen garden, now the second largest botanical garden in the world.

This platform is now a memorial dedicated to those who were deported during the Holocaust.

This concrete residential area doubles as an open-air gallery.

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.

Berlin's old airport.