Unlocks the builder ability to construct a Foggara, unique to Berbers.
+1 Housing, +1 extra Housing after researching 'Engineering' Technology, +1 extra Housing after researching 'Apprenticeship' Technology. +1 Food to adjacent resources, extra +1 Production after researching 'Engineering' Technology. Provides +2 to adjacent Cistern and +2 Production adjacency bonus to Industial Zone. Cannot be worked. Can only be built on flat lands not adjacent to another Foggara. Can be built on Hills and Floodplains after researching 'Iron Working' Technology.