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

A superb Paleo-Christian baptismal pool is preserved among the ruins of ancient Sufetula.

An ancient burial ground believed to have been used for ritual sacrifice.

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

Some believe this abandoned Brutalist masterpiece inspired George Lucas's Sandcrawler.

This jar honors the role that pottery has played in this Tunisian village over the past millennia.

The largest falcon hospital in the world, caring for over 6,000 feathered patients every year.

No building in the world leans as far as the so-called “Leaning Tower of Abu Dhabi.”

Whitewashed mosque contains the world's largest carpet.

This peaceful Sikh gurudwara serves around 50,000 free meals every day within its gilded walls.

The first transatlantic wireless signal was received at this 17th-century fort.

The Avenue of Mausolea is a series of grand palatial tombs.

Light still pours into the ruins of this ancient Islamic observatory.

An 18-meter-long sarcophagus of a constantly growing dead prophet.

A plaque on the side of a building is a small tribute to the woman who invented an iconic Berlin fast food.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.