A musical instrument played by the sea.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Tiny memorials honor individual victims of the Holocaust.

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

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.

A steel paper plane is all that remains of a crashed aircraft that caused an amazingly small amount of damage.

A golden plaque marks the site of the mysterious unsolved assassination of the former Swedish prime minister.

This mysterious runestone embedded in a church wall is linked to the medieval cult of Saint Erik.

Ancient burial grounds of the wealthy.

Inside this medieval church resides a unique set of murals.

A massive tribute to Estonian history and culture.

This stunning limestone waterfall is the highest in Estonia.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

The widest natural waterfall in Estonia is a sight to see in all seasons.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

An artificial date palm stands as a memorial to Warsaw's Jewish community.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

This hidden collection of everyday objects illustrates life within communist Poland.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.