One of the deepest indoor swimming pools in the world.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Hiding the longest subterranean river known in the world.

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

A Belgian self-built tower inspired by the Bible and ancient civilizations.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

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

Cozy basement bar sports an inventory of over 2,000 beers.

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

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

Lavish royal estate punctuated with heated greenhouses.

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

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

The apartment building where JFK's assassin lived after defecting to the Soviet Union.

A unique park tells the geological history of Belarus in a national “map” of thousands of boulders and blue spruce.

The old fire station features a mural that has more to it than first meets the eye.

A striking Soviet memorial commemorates the liberation of Belarus from the Nazis.

Glowing orb in Minsk houses 8,600,000 items.

Remains of the old fortification along the Western border of the USSR, now an elaborate defense museum.

A small museum in this border city displays the contraband art that has been stolen back from smugglers.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

The site of Austria's biggest concentration camp now honors its victims.

Home of controversial poet priest who penned the words for the Austrian national anthem used in the 1930s.