-where walls look like cliffs
The ksour (singular: ksar, plural: ksour) of Tunisia, and the Maghreb in general, are fortified villages, usually built on hilltops, and consisting of a group of connected houses, often having collective granaries and other buildings such as a mosque, bath, oven, and shops. The buildings are built into the cliffs, with the walls merging into their surroundings, achieving both camouflage and natural insulation.
Chenini is one of the more spectacular of the ksour on the Berber tourist trail in southern Tunisia, built as it is between two ridges to afford protection against raids. The oldest structure here dates back to the 12th century, and some of the granaries are still used for heir original purpose by the villagers now living below. Cheninie is in the tatouine district of Tunisia and you will likely have seen images of it before as this is the area used for filming Star Wars.
Other villages around include Douiret, Ksar Ouled Soltane, Ksar Hailouf and Ksar Hadada. In fact, the word ksar features in place names across the Maghreb, particularly on the Saharan side of the Atlas Mountains and the valley of the Draa River. The Spanish terms Alcázar and Portuguese Alcácer are derived from this North African Arabic word, and appear in place names and buildings originating as fortresses.