A fortified city, home to a remaining population of five families

The oldest monument in Marrakesh and the city's only surviving example of Almoravid architecture.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

A single artist is behind these large-scale models made of hundreds of thousands of two-inch wooden matchsticks.

From carts to cars, this leftover Roman bridge in France has managed to survive for centuries.

The 14th-century ruins are said to contain healing powers.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

The fairy tale castle of the "fairy-tale king."

This remote castle was built to be a wealthy businessman's palace of vice but is now simply a historic vacation cottage.

A unique waterfall that some believe attracts the fairfolk.

Founded as a refugee camp, now a popular tourist spot.

A city built from mud and known as the "Manhattan of the desert."

This castle-fortress is a living example of the transition from medieval defenses to modern fortifications.

An imposing Omani fortress surrounded by date palm trees.

The granddaddy of English geoglyphs dates back to the late Bronze Age.

This picturesque archeological site looks like it was pulled straight from a fantasy novel.

A remarkably well preserved tower dating all the way back to the Iron Age.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

One of the largest necropolises in the world is home to a stunning array of historic Middle Eastern tombs.

This little town supplies Japan with most of its calligraphy brushes, still made by hand from animal fur.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

A striking symbol of the Bulgarian capital.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.