Have you looked a photos of ancient Roman aqueducts still standing around the planet? A few are even still functional, after 2000 years, including at least one in Rome itself. Impressive.
Here's a great site that shows examples called Bridges that Babble, and features 15 amazing Roman aquefers. The scale of the architecture is breathtaking, and the skill of the craftsmen who built these water delivery systems is nothing short of exquisite.
I also found this one online at Nerja, on the Southern coast of Spain.