3,000 market stands in five former Zeppelin hangars.

This striking memorial is one of Estonia’s most controversial Soviet leftovers.

The Guardian of Tallinn.

Only a fragment of this 15th-century Dance of Death survives today.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

Home to three historic ships from the age of Vikings.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

Follow the original medieval paths that wind through this intriguing section of the city.

Also known as "Robin Hood's tree," this tree became a famed location along Hadrian's Wall before it was cut down in an act of vandalism.

This monument commemorates the only American soldiers to have directly fought Russians during World War I.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

Some of the best-preserved specimens of the monumental medieval tombstones found throughout Bosnia and Herzegovina.

Modern art commemorates one of the first military actions of World War II.

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

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

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

The final resting place of more than 200,000 people, this is one of the largest cemeteries in Europe.

A statue honors the children who fought Nazis in Poland.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

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