A visionary precursor to the Internet made of index cards.

A wonderfully kitsch bookstore the size of a supermarket.

A Museum of Psychiatry in a still-operating mental institution.

One of the deepest indoor swimming pools in the world.

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

A museum of carnival attractions where you are invited to ride the rides.

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

A museum of magic with a Sadist past.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

Museum devoted to the artificial language of Esperanto.

Micro-nation based around a nine-story high illegally built tower.

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

The former home of a trailblazing surrealist is still filled with haunting dolls and grim paintings.

Visitors to this Belgium graveyard are greeted by the grieving stone parents of the young men lost to war.

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

A 1:20 scale piece of the Netherlands commissioned by a queen lets visitors take a stroll as giants.

A garden of flying flowers.

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

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

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

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

The world's largest boar is a huge steel titan found at a French rest stop.

Brussels' favorite peeing boy has a sister.

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