Belgium's national heroine turned spy sacrificed her life to combat German occupation.

Tiny sculptures hidden in plain sight miniatures in Namur.

The world's tallest boat lift stands as a massive piece of industrial tourism.

A once-magnificent collegiate church is falling into ruin.

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

Hiding the longest subterranean river known in the world.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

Tiring of digging out the door to this church for every service, it was eventually abandoned to the sands.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

An abandoned lighthouse awaits its destiny: being buried under shifting sand.

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

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

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

The Arctic Circle runs through this isolated spot north of Iceland.

A giant concrete orb in far north Iceland marks the ever-shifting boundary.

Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This elegant arc of a waterfall marks a religious turning point.

The most powerful waterfall in all of Europe.

Walk in the footsteps of the gods and straddle two tectonic plates.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

The opulent car collection of an eccentric Sheikh housed in his own private pyramid.