No need to strap in for a “ride” on this walkable roller coaster.

This former steel and coal plant is now a neon-lit industrial fantasia.

Metro station with a claim to rock n' roll fame.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Cold war icon and onetime "hole" in the iron curtain.

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

The only microgravity tower in Europe can produce nine seconds of weightlessness.

This 600-year-old home seems to defy physics.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

Bell tower juts out from a village buried under a lake.

An old slaughterhouse now holds the largest collection of pig artifacts.

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

Fantastic views and thousands of love locks.

The sweet story of how American cargo planes became known as "Candy Bombers" during the Berlin Blockade.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

Hamburgers are intensely proud of their tunnel beneath the river.

Model Trains and Much More in Hamburg.