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

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

Traditional 11th-century outdoor tannery.

This 16th-century Moroccan fortress-turned-armory museum offers prime views of the historic quarter in Fes.

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

An ancient Phoenician citadel once stood at the site where Queen Dido first landed, according to legend.

This museum in the famously blue neighborhood of Sidi Bou Saïd showcases a traditional Tunisian lifestyle.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

Founded in 670, this ancient mosque is an architectural time portal.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

This church is named for one of the most dramatic tales in the early Christian church.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

Mysterious hillside with a continuously burning natural fire.

The building's fluid, wavelike walls are a true feat of architectural ingenuity.

This mysterious but iconic tapered tower appears in many Azeri fairytales and legends.

A shrine of fire worship built on top of a natural flame.

A massive collection of petroglyphs dating back some 40,000 years.

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

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

A museum glorifying the life of Stalin, located in the city of his birth.

Ancient rock-hewn town that witnessed key events of Georgian history.

Foreign invaders almost left this lovely Caucasus palace alone—almost.

You'll find just about anything in this funky Tbilisi flea market.