A musical instrument played by the sea.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

As can be expected from a centuries-old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

Once the home of a hermetic monk, this cave now houses a small church.

Where the lovelorn find a home for their sentimental keepsakes.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

For over 300 years this little carving has been the city’s good luck charm.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

Monsters and miniatures are held in equal esteem at this wondrous museum.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Home of the Large Hadron Collider and the birthplace of the World Wide Web.

A curious art park at the geographic center of Europe is home to 3,000 television sets and other wonders.

While this monument tile is shrouded in mystery it also marks the end of the longest ever human chain.

This micro-nation may be some sort of prank, but its constitution sure seems official.

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

3,000 market stands in five former Zeppelin hangars.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

A mocking tribute to the past and modern leadership of Prague.