Cliff dwellings on the Bandiagara escarpment in the Sahel region, Dogon country of Mali. There are dozens of villages along the cliff. The UNESCO World Heritage Site has been occupied since the century. by Ferdinand Reus
Slums outside of Lima, Peru. They are on land taken over by mostly rural Peruvians who are attracted to Lima and better jobs. Eventually the government runs electricity and water to these settlements, even though they are squatters' villages.