The most peculiar part of Berlin's public transit network is an on-demand rowboat.

A massive tribute to Estonian history and culture.

A forest park outside Tallinn full of architectural and artistic curiosities.

Spend your honeymoon where the Devil had his wedding.

One of the last remaining railway viaducts equipped with a transporter ferry.

The world's first and only three-segment bascule bridge folds up into the shape of a capital "N" to let boat traffic through.

An elevator into the Baltic Sea.

A unique, playful portrayal of Jesus as a backpacking traveler.

An 18-panel Soviet mosaic showcasing the scientific advances made under socialism.

Before he was forced to flee the country under Nazi rule, Albert Einstein spent his summers in this custom-built lakeside house near Berlin.

The metal-free wooden towers of Brück.

This 500-meter-long memorial pays tribute to the hundreds of thousands of lives lost to COVID-19 in the UK.

According to local legend, the devil shattered this column after losing a bet.

A quasi-futuristic roof sits atop a medieval Bohemian monastery damaged during World War II.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

A Jenga-style cylindrical tower of books that appears to go on forever.

A massive relic of the communist era of Berlin.

A memorial commemorating the place where Truman gave the order to deploy the first nuclear bombs on Japan.

A local train station entrance hall doubles as a sanctuary for barn swallows.

If you visit the burial place of King Frederick the Great, you'll likely find a couple of potatoes sitting on his tombstone.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Centuries of warfare, tragedy, executions, and poetry come together in this 13th-century fortress.

Every half hour the eye-rolling clock face sticks out its tongue to mock the good citizens of Koblenz.