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

In legend, this ancient dolmen was said to have been created when a troll tried to destroy a church.

Iron Age "bog person" preserved for over 2,300 years.

Remnants of the Nazis' occupation of Denmark linger along the sand.

Along this stretch of beach in Denmark resides several massive bastions of energy.

These old World War II fortifications have been transformed into an unusual equine attraction.

This huge industrial sculpture looks like a UFO and a factory had a baby.

Constructed by forced laborers, this submarine pen is now a museum and war memorial.

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

The nerve center of a massive, state-of-the art radio telescope that sprawls across Western Europe.

This steel frame is a skeletal mirage of a lost 16th-century stone building.

This unique bridge physically lifts a piece of the road into the air to let boats pass by.

The 20-mile causeway that separates the Netherlands from the sea.

Yup, that's a 330-foot yacht passing over the highway.

A large measuring stick marks the lowest point of a country that is partially under sea level.

Lumps of significant stone from around the world surround a flaming monument for peace.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

This enormous storm barrier is one of the largest moving structures on Earth, with each arm taller than the Washington Monument.

Watch the local Netherlands birds from inside this giant eco-egg.

Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

A UFO-shaped event building originally intended to be a science museum showcasing the future.

The "Black Arch" guards the entrance to the picturesque Glens of Antrim.

A giant roundabout made up of six smaller roundabouts can befuddle the uninitiated.