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

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

This 13th century Gothic brick castle is the largest in the world by surface area.

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.

This museum houses and extensive collection of technology contributed by the Polish people.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

This magnificent Art Deco church is a reflection of Lithuania’s turbulent history.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

During the Soviet era, the spire of this longstanding church was used as a radio transmission tower.

An abstract monument to a symphonic composer.

A subterranean house of worship carved right out of the bedrock.

A cathedral resurrected from the ashes of one of Europe's greatest urban fires.

The final resting place of the father of modern biological taxonomy.

It houses the remains of a 17th-century version of the Titanic.

Copenhagen's celebrated theme park and gardens.

Historic medieval fortified city in southwest France.

This ancient theater was once the home of fierce gladiatorial battles.

The lost Latin words were reconstructed using the holes from the nails that once pinned them in place.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.