An isolated village literally built into the crevices and rock formations of a mountain.

A breathtaking canyon offers stunning views and frightful pathways through an ecological paradise.

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

In one of the smallest countries in the world stands an original Salvador Dalí sculpture.

A functioning Roman-era aqueduct and bridge in rural southwest France.

The site of the first medieval crusade that pitted Christians against Christians.

The world's tallest bridge is also possibly the most elegant.

This French chateau is home to the world’s largest private collection of fighter jets.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

An intricately carved Viking church overlooks a glistening fjord.

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

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

The hallucinogenic center of the ancient world.

Step inside an ancient beehive tomb built for a mysterious cult hero.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

An abandoned saucer-shaped monument in the Bulgarian mountains.

Budapest's Communist-era statues, banished to the suburbs.

The world's oldest grape-producing vine has survived four centuries of turmoil and even has its own anthem.

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

Colorful and chaotic stacked hotel in North Holland.

This large sand dune in the Netherlands is home to wind-whipped trees with "floating" roots.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.