This former coal mine, now a fascinating museum, was the site of Belgium's worst mining disaster.

The tiny Belgian town's ancient version of Mardi Gras involves eerie wax masks, sticks for warding off evil, and ostrich plume hats.

After the construction of a nearby cathedral obstructed the view, the oldest belfry in Belgium was more than doubled in height.

The last bastion of Roman presence north of the Alps looms over a German town.

This natural "sea of stones" was once used by the Romans as a quarry.

Along the banks of the River Rhine lies a park that seems unassuming, but beneath the surface lies a long and fascinating history.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Tiny castle in the middle of the Rhine made you pay to pass.

The many—66 to be exact—faces of the German forest.

Legendary site where an evil bishop was devoured by rodents.

This 1920s Dutch barge is now a floating bookstore.

Rebuilt remains of a temple to Roman god Mithras.

A tongue-in-cheek arcade where the games are based on everyday life.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Massive installation of Europe's negative stereotypes.

Be(w)ar(e) the moat around this historic Czech castle.

A massive 1830s industrial site once known as Czechia's "Iron Heart" has been transformed into a playground of science, technology, and art.

Enormous sandstone towers loom within a Czech forest.

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

Bohemian paradise covered in majestic forests.

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

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

A spiral staircase twists to the top of this unusual Czech lookout tower.

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