You would never come across this tiny green oasis if you didn't know it existed.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

Walk or bike along a narrow strip of Belgium sandwiched by German territory.

Tintin's creator is celebrated in an immersive museum that's an astounding work of modern art.

A museum celebrating the Canadian forces that liberated Belgium from the Nazis replete with battlefield miniatures and multiple Gardens.

Housing the groundbreaking maps and globes of Gerard Mercator.

This bike path traverses the treetops.

A Cold War command center is hidden under an idyllic countryside.

This sprawling Belgian fort was once thought of as impenetrable but now it is simply an abandoned relic.

The highest point in Belgium is a staircase to nowhere.

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

A rare example of World War I trenches from the British front.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

This ghost town in Belgium will lose its street art when it ceases to exist.

Climb inside an iron crystal magnified 165 billion times its normal size.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

This vast World War II defense line was the site of a fierce battle.

This Dutch windmill has its roots in an American invention.

It's forbidden to dig within this ancient Roman fort hidden beneath a playground.

Wind power station for making famous Ketel One vodka.

This old KLM airplane cut into three parts was transformed into an eclectic airport gift shop.

A rare double mill nestled along the banks of the Aa river.