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.

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

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

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

Stairs often replace streets on the steep slopes of this old mining town.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

At an isolated roadside rest area stands a monument marking where famous Western star Tom Mix died in 1940.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

A reproduction of earth's many biomes.

A rare wayfinding portmanteau of “Street” and “Avenue.”

In Tucson a giant metal snake helps pedestrians cross a busy highway.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

This southwestern historic site was designed and built by an artist who wanted his work to "feel at home."

The Magical World of George Phar Legler.