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

An early 20th-century sanatorium, long abandoned and now being reclaimed by nature.

This annual Belgian water race attracts bathtub captains from all over the world.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

This bike path was sunk below water level for maximum wonder.

When you're a great Russian Tsar, even your vomit gets a statue.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

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

Theme park featuring miniature replicas of European monuments.

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

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

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

Lavish royal estate punctuated with heated greenhouses.

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

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

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

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

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

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

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

On a small Slovenian island, diners can mix and match a classic cake into dozens of sweet and savory flavor combinations.

The pharmacy's retro ice cream mixer is one of the last of its kind.

This legendary dessert was served to Nobel laureates for decades.

Architectureal fantasy quarter of Rome.