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

Traditional 11th-century outdoor tannery.

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.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

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

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

Macabre astrological automaton clock dating to the late 1400s.

The house that took a plunge into the facade of a museum.

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

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

At this rare mosque in Tbilisi, Sunni and Shia Muslims pray side by side.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

This architecturally eclectic fortress witnessed centuries of bloody turmoil, including the massacre of its ruling clan.

A cylinder monument with a spectacular vista commemorates a friendship that some say never existed.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

Fortified homes of highland warriors that are still in use today.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

Underground monastery and fortress.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

Men and special assistants stand by the road to sell the day's catch in this lakeside village.