Djémila or Cuicul is an interesting example of Roman town adapted to a mountain location, as it's situated 900 m above sea-level. The ruins of the city still have its forum, temples, basilicas, triumphal arches and houses.  

M'Zab Valley, a traditional human habitat, created in the 10th century by the Ibadites around their five ksour (fortified cities). Simple, functional and perfectly adapted to the environment, the architecture of M’Zab was designed for community living, while respecting the structure of the family. It is a source of inspiration for today’s urban planners.  

Tassili n'Ajjer, this site has one of the most important groupings of prehistoric cave art in the world, more than 15,000 drawings and engravings record the climatic changes, the animal migrations and the evolution of human life on the edge of the Sahara from 6000 BC to the first centuries of the present era. Located in a strange lunar landscape of great geological interest, the geological formations are of outstanding scenic interest, with eroded sandstones forming ‘forests of rock’.

Timgad, are the ruins of a roman military colony founded by the Emperor Trajan in AD 100 on the northern slopes of the Aurès mountains, it is an excellent example of Roman town planning.

Tipasa, on the shores of the Mediterranean, Tipasa was an ancient Punic trading-post conquered by Rome and turned into a strategic base for the conquest of the kingdoms of Mauritania. It comprises a unique group of Phoenician, Roman, palaeochristian and Byzantine ruins alongside indigenous monuments such as the Kbor er Roumia, the great royal mausoleum of Mauritania.

Kasbah of Algiers, is a unique kind of medina, or Islamic city. It stands in one of the finest coastal sites on the Mediterranean, overlooking the islands where a Carthaginian trading-post was established in the 4th century BC. There are the remains of the citadel, old mosques and Ottoman-style palaces as well as the remains of a traditional urban structure associated with a deep-rooted sense of community.