This abandoned Belgian fortress is purposefully being left to nature.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

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

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

This Belgian palace was long the domain of priests and aristocrats but is now being turned into an art commune.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

The tiny Belgian town's ancient version of Mardi Gras involves eerie wax masks, sticks for warding off evil, and ostrich plume hats.

A once-magnificent collegiate church is falling into ruin.

This modern arts center is built around a gem of late-Baroque architecture.

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

The highest point in Belgium is a staircase to nowhere.

A 141-foot wave of crashing lumber guards the entrance to the Grand Place in Mons.

Explore 400,000 years of humans' "battle against darkness" in this offbeat but thorough lamp museum.

Artwork tucked within the trees greets visitors with surreal sonic experiences.

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

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

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

The bronzed skull of a beheaded traitor was affixed to the city gate in the 17th century.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.