The Guardian of Tallinn.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

The last king of Poland was interred in this church nearly 200 years after his death.

Hundreds of notes give thanks to the patron saint of lost causes.

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 Polish cave has housed a dragon, a brothel, and an enduring legend.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

Go surfing on this urban wave, "hacked" by local surfers.

A fearsome dragon clings to a corner of Munich's city hall.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The patron saint of spinsters grasps a container of dried blood.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.

A musical instrument played by the sea.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

A Nesting Doll of Churches.

A fortified medieval basilica on the Caelian Hill preserves extraordinary frescoes and one of Rome's most beautiful hidden cloisters.

A pilgrimage site where people ask Saint Dymphna to watch over those who are not of sound mind.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

An exquisite Baroque church in Vienna's old town.

The solemn exterior conceals an opulent interior of this 17th century church.

A silly medieval mural preserved on the side of a Viennese house.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.