This former insane asylum now holds a pathological anatomy museum.

This semi-secret storybook hedge maze is also the oldest garden in the city.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Abstract dinosaur models in London.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

One of the best collections of wax anatomical models in the world.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

A series of haunting wooden totems are hidden in the woods surrounding a German environmental center.

The home of the morbid art of corpse plastination is open for visitors to view the fascinating, but stomach-churning process.

This "floating railway" is one of the world's oldest monorail systems.

A striking 12th-century-style castle built on the edge of a cliff.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

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