An ancient fortification lives on in this Chinese city.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

According to one legend, this bridge was crafted after monkeys formed a body-bridge across the gorge.

Remnants of the Roman empire's northern frontier nestled in suburban Glasgow.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

The childhood home of the famous general's mother is now a small, walled garden.

Also known as "Hell Alley," this tiny street in Imola gained its name in a bloody episode in the 16th-century.

A masterpiece of modern architecture that caused quite a stir in Paris, recreated in Bologna half a century later.

Come for the fish sundae, stay for the collection of Studio Ghibli cat buses.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

This medieval mountain town is also known as the "Village of Streams."

Hanging over one of Japan's "hidden valleys," these vine bridges must be remade every three years.

This museum preserves over-the-top masterpieces that once qualified artisans for membership into a medieval guild.

This bed and breakfast is steeped in history and offers guests a unique way to experience nature—glass igloos on a frozen lake.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

Led Zeppelin wrote some of their most iconic songs at this little 18th-century Welsh cottage.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

A winding path built in secret on the edge of the continent.

A tunnel with windows, so you don't miss out on the impressive views.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

One of Kyoto's oldest food establishments has supplied soba noodles to temple priests and the Imperial Palace.

Part of this hotel resides in Switzerland, the other in France, and the border splits the honeymoon suite.

A hidden three-foot-wide house separates these two regal churches.

The world’s narrowest house makes for an awkward, four-foot-wide living space.