Algeria

A centuries-old Ottoman-medieval citadel and harbour quarter on the Algerian coast, with dense stepped streets, a Great Mosque, and layered Ottoman, Andalusian, and Barbary corsair history.

The monumental tomb of King Massinissa (c. 238–149 BCE), founder of the Numidian kingdom and unifier of the Berber tribes of North Africa, standing at El Khroub near Constantine as the finest surviving example of Numidian royal architecture.

A 19th-century Ottoman provincial palace perched at the edge of the Rhumel Gorge in Constantine, Algeria, famous for its dramatic setting and the Sidi M'Cid Bridge that spans the gorge in front of it.

A UNESCO-listed pentapolis of five fortified Ibadi villages built between the 10th and 14th centuries in the northern Sahara, exemplifying a vernacular urbanism adapted to desert life through collective organisation and a hierarchical settlement structure.

A vast sandstone plateau in southeastern Algeria bearing one of the world's largest concentrations of prehistoric rock art — images of large mammals, human figures, and domesticated cattle painted and engraved in natural rock shelters over roughly 10,000 years.

A remote Roman mountain town in the Tell Atlas founded in the first century CE for retired legionaries, featuring temples, basilicas, and theatres in an olive-growing upland setting, UNESCO-listed since 1982.