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The Roman aqueducts are a remarkable example of ancient engineering designed to transport water over long distances. structures supplied cities fresh water for public baths, fountains, and homes. Using a , slight downward , the aqueducts relied on gravity move water sources in hills. The construction often involved impressive stone arches to cross valleys and uneven terrain. Many of these ancient aqueducts still stand today, a testament to the skill and ingenuity of Roman engineers.