This centuries-old Italian chapel hangs midway down a sheer cliffside.

A unique form of erosion created an uncanny landscape of boulders perched atop slender columns of clay.

Gigantic mosaic sculptures of the figures on Tarot cards fill this colorful Tuscan garden.

Romans built the world's tallest artificial waterfall in 271 BC.

This precariously perched fortress was once ruled by a crow-worshipping baron.

What looks like a link in Gondor's early warning system is actually a centuries-old Italian fortress.

This 16th-century monastery has been turned into a surrealist architecture compound.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

The mark of the Devil's horns on a marble column in Milan.

Pilgrimage site for star-crossed lovers.

A lover's walk between hilltop towns, decorated with graffiti love notes.

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

A complex, nine-layer maze on the grounds of a Venetian doge's playground.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Water and windows define this defensive Italian well.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

A 16th-century horror show built in a lovely Italian garden.

This military mausoleum captures the solemn grandeur that most memorials only aspire to.

This Italian foot path winds through the mountains via 52 individual tunnels.

This artistic temple brings together multiple architecture styles, but is only an example of one.