Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

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

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

Brussels' favorite peeing boy has a sister.

A shining memorial to a Belgian hero is said to bring luck to anyone who touches it.

A little sculpture with a large wardrobe.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

The topiary maze at the Habsburg hunting lodge.

Tiny communists hammer away on the Olomouc Astronomical Clock.

An ornate plague column – built to celebrate life – claimed the lives of numerous artisans during its construction.

Macabre astrological automaton clock dating to the late 1400s.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

This automated sculpture of two men peeing will spell out text messages with their micturition.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

Zurich's evolution museum hosts a unique collection of skeletons among its natural history treasures.

See the rare bloom of the "Queen of the Night" cactus at one of the world's largest succulent collections.

A remarkable two-country morph, this town is part of Germany legally but is by all other measures Swiss.

The zoological collection at the Hessisches Landesmuseum hosts some of the world's oldest habitat dioramas.

A beautiful maze marks where three countries meet.