cliff dweller

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A member of certain Ancestral Puebloan groups of the southwest United States who built rock or adobe dwellings on sheltered ledges in the sides of cliffs.
• noun Informal A person who lives in a large apartment house, especially in a city.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a member of the Anasazi people living in the southwestern United States who built rock or adobe dwellings on ledges in the sides of caves