The old observatory in Copenhagen has a spiral corridor used as a racetrack.

The only surviving piece of Copenhagen's 16th-century defensive wall.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

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

Hans Christian Andersen for the postmodern world.

The world's only above water sand volcano, believed to once be the bathtub of a priest.

This chimerical bridge/tunnel appears to dead end right into the sea.

According to legend, this boat-shaped henge is built over the grave of a mythic king.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

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.

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.