Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This abandoned Slovenian military barracks has become a punky-political art squat.

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

A replica of the gaslit streetlamp under which three teenagers founded a football club.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

One of the tallest waterfalls in Africa is also home to a population of monkeys who enjoy the waters and the occasional guest.

Traditional 11th-century outdoor tannery.

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

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

The former home of Dutch anthropologist Bert Flint now houses a collection of Berber art and artifacts.

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

Within the Dadès Gorge, amazing vistas and towering cliff faces can be seen at each new curve and bend in the road.

One of the most spectacular canyons in the world.

Mosaics, storks, and brothels—this ancient city has it all.

The courtyard of this small Marinid madrasa is a dazzling example of intricate Islamic architecture.

God's Saharan sandbox of wrath.

The ancient abodes are a testament to human ingenuity amid harsh climates.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

Standing proud atop a Turkish bluff, this Ottoman palace has retained its grandeur despite being abandoned for centuries.

Natural rock formation, or biblical artifact that saved Earth's wildlife two by two?

An ancient capital city that dates back 3,000 years old and harbors many surprises.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

This natural monument has an origin story steeped in legend.