A boulder carved into the shape of the cosmonaut's head.

The world's largest and most outstanding marl lake regularly changes color.

A wondrous old library overlooking the nation's capital.

A nostalgic bibliographic gem.

In addition to fine dairy products, the world's most beautiful milk shop also offers a feast for the eyes.

This modern arts center is built around a gem of late-Baroque architecture.

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

Visit this church that's shaped like a giant glass pump either to cater to women or to reference a tragic local tale. Or both.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

These eerie outliers of the lightning bug family glow a mysterious blue color.

One of the largest mechanical models of the solar system in the world.

A five-square-mile slice of Spain on the Mediterranean coast of North Africa.

This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

The world's first interactive human body museum also serves as a chair for a giant orange man.

The artist and his brother are buried in a landscape straight out of a van Gogh painting.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

The room where Vincent van Gogh died.

An small and easily overlooked archaeology museum chock full of Egyptian artifacts.

This colorful theme park dedicated the official fruit of Maine serves sweet, tasty treats.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

Double spiral staircases are not unheard of, but they are very rare.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

An Austrian house of bones filled with hundreds of intricately painted skulls.

Every color in the rainbow awaits.