Longest fortress system anywhere in Europe.

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

Breathtaking Byzantine paintings cover the inside of this 12th-century church.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

This quaint museum tells about more than just the birth of Jesus: "betlémy" are an important piece of Czech history.

A mesmerizing landscape of 18th-century cellars carved out of the land.

An ornate plague column – built to celebrate life – claimed the lives of numerous artisans during its construction.

Tucked away in a Prague park, a statue beloved by romantics honors a poet so nice they buried him twice.

Enormous sandstone towers loom within a Czech forest.

Folklore says this medieval fortress was plopped atop a portal to hell to trap the demons below.

This former quarry is now a picturesque gorge that hides a sunken lake.

Bohemian paradise covered in majestic forests.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

Walk through Czech history in Prague's largest graveyard.

This striking royal residence is the largest Renaissance-style castle in Scandinavia.

Old Danish castle immortalized in Shakespeare's Hamlet.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

This disappearing geyser has been attributed to witchcraft, but really it's all about rainfall.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

This workshop and small museum is dedicated to tiny, delicate figurines that began as a subversive craft after the French Revolution.

This folk museum is devoted to small figurines of provincial village life.

This prehistoric figurine is the oldest known realistic depiction of a human face.

The site of the first medieval crusade that pitted Christians against Christians.

Napoleon's childhood home is now open for people to explore the beginnings of France's short general.