The aqueduct of Segovia is a classic example of Roman water transport architecture—simple in design, yet magnificent to behold, and surprisingly durable. The aqueduct was built in the 1st century AD to convey water from Frío River, 17 km away, to the city, and it has been carrying out this function in one form or another for the past 2,000 years. This is all the more impressive when you realize that this aqueduct was built without a single ounce of mortar. https://europerenaissance.com/2020/11/02/aqueduct-of-segovia-the-mortar-less-miracle
