A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

The premier place to experience the Victorian imagining of the steam-powered future.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Inside this faux cave, visitors can learn how some of their favorite fantasy characters were created.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

France's national museum of scientific and industrial instruments.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This museum houses an imposing skeleton army comprised of creatures great and small.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

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

Notorious artist squat renovated into legal studios.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

A kaleidoscopic warehouse-maze of handmade neon signs.

The tallest church in Mechelen might have been the tallest in the world if not for a lack of funds.

Learn about stars, weather patterns, or just enjoy the panoramic view of Ghent.

A jazz band formed by African water animals in the heart of Flemish Brabant.

Relics from as far back as the 16th century are on display in a city known for its playing card industry.

What was once a bustling mining installation is now a bustling hub of contemporary art.