World wonder of the Ancient era in Civilization VI Production cost 180 File:Civ6Production.png Technology Image:Irrigation (Civ6).png Irrigation Effect Removed if game started after "The ascent to the highest story is by stairs, and at their side are water engines, by means of which persons, appointed expressly for the purpose, are continually employed in raising water from the Euphrates into the garden." –Strabo The Hanging Gardens are an Ancient Era Wonder in Civilization VI. It must be built next to a River.