Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

A former plague hospital turned medical museum.

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

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

Colorful and chaotic stacked hotel in North Holland.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

This residence straddles a border between Belgium and the Netherlands.

A massive, gleaming sea turtle with a rider atop its shell looks out over the horizon.

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

Brussels' favorite peeing boy has a sister.

Meet the bronze beloved pet to a family of famous peeing statues.

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

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

Oriental bazaar in the heart of Sarajevo.

This museum preserves the hand-dug tunnel that kept Sarajevo afloat during the Serbian siege.

These warring psychedelic crags commemorate an unsuccessful military operation.

Bridge that died in war and was resurected.

A whimsical bridge adorned with decorative dragons.

This abandoned Slovenian military barracks has become a punky-political art squat.

This one-time health resort was used by aristocrats around the world.

This historic electric train has operated with regularity since the early 1900s.

This art installation at an abandoned lipstick factory has distinct anti-capitalist vibes.

Giant topiary dog once played a role in a terrorist bomb plot.