A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Bridge that died in war and was resurected.

Yugoslavia's biggest underground airport lies in ruins.

A little sculpture with a large wardrobe.

Baroque celebration of the end of the Great Plague of Vienna.

Op-art architecture designed for happiness.

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

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

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

The oldest known university in the world is in Fez, Morocco.

Traditional 11th-century outdoor tannery.

God's Saharan sandbox of wrath.

Vast stretch of tide-pools with a unique Moroccan charm.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The other side is actually green.

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

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

One of the most spectacular canyons in the world.

Morocco's Argania trees are infested with nut-hungry goats.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.