The centuries old trees lining both sides of this dirt road may become Madagascar's first natural monument.

One of the last realized projects of an influential, self-taught, French Modernist architect Jacques Couëlle.

The most alien-looking place on Earth.

Enormous underground chamber built to detect 'ghost particles' of the universe.

Extremely isolated Silk Road caravanserai in the middle of nowhere.

A new kind of theme park for adults off the Las Vegas Strip.

Nature took her revenge on the "Wickedest City in the World."

An exquisite tunnel of cascading flowers.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

These "50 Fortresses" have been unearthed in the ancient oasis of Khwarezm.

A museum dedicated to exhibiting remarkable outsider art.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an eighth-century Buddhist master.

Nimrod Polar Expedition base, and home to hundred-year-old frozen whisky.

Breathtaking and huge 430 year old maps of Italy.

France's most famous cemetery, with some of its most curious tombs.

Hundreds of Buddhas in a re-discovered Indonesian temple.

An abandoned colonial French prison notorious for its hellish conditions.

Japanese national treasure originally built in 593 CE.

Ferdinand Magellan dubbed the world's largest water village the "Venice of the East."

Former utopian colony based on the belief that the universe exists in a hollow sphere.

Florida castle built with aluminum printing plates.

Manatees congregate around a power plant's discharge canal where the water is especially warm.

A marvel of Byzantine engineering under the streets of Istanbul.

A Buddhist theme park brings you a Buddhist version of Hell.