Image that you lived in Roman times. When clean, fresh water was a rarity in most cities of the world, cholera was a constant risk and dysentery was the norm. Now image coming to Rome where every city block had a fountain that ran all day and all night, gurgling with clear mountain water drinkable from the tap.
This water wealth was one of the defining characteristics of Rome, a stunning accomplishment before the advent of indoor plumbing or even urban sewers. And when the Goths broke the aqueducts that brought this water from afar, the city crumbled and fell into a thousand year disuse.