The “Coin Cabinet of Dresden” houses a collection of over 300,000 numismatic artifacts, one of the largest of its kind in Europe.

These Bronze Age rock carvings are among the oldest in the region.

These mysterious circular formations are actually remnants of 19th century gristmills.

The world's only above water sand volcano, believed to once be the bathtub of a priest.

A geological wonder that helped fuel myths of trolls and giants.

An otherworldly, fossil-rich cobble beach holds Viking graves, cairns, and other remains.

Enigmatic bug-like sculptures mystify drivers along a Swedish highway.

Crooked windswept pines give this old forest an enchanted and magical look.

A tribute to the first human in space.

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

This biographical museum honors the groundbreaking scientist at her birthplace in Warsaw.

A striking public sculpture representing the period of martial law in Communist Poland.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

The inky volcanic sand leads to reefs teeming with aquatic life waiting to be discovered by snorkelers and divers.

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

Humble beginnings for one of the world's most famous scientists.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

An ethereal glowing blue ocean cave in Croatia.

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

A musical instrument played by the sea.

A stone in Wolin, Poland, marks the possible location of a legendary Viking fortress.