This still-celebrated home was a radical architectural experiment in 3D De Stijl.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

The world's first interactive human body museum also serves as a chair for a giant orange man.

Two gravestones clasp hands over the religious divide.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

A beautifully eclectic mix of architectural styles.

A beautiful maze marks where three countries meet.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Every inch of this chapel is covered in craftsmanship from across the world.

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.

A petite white lighthouse perched on the ancient core of Stromboli Volcano.

The Roman Emperor's lost summer home and grotto full of enormous sculptures sit along the Italian seashore.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

Fortified medieval tower house with lovely roof garden.

Southern Italy's spinning top village.