Aqueduct of Segovia, Spain
The Aqueduct of Segovia is one of the most significant and best-preserved monuments left by the Romans. It is among the most important symbols of Segovia, the city of Spain.
The word aqueduct comes from the Latin words aqua - water, and ductum - led. Indeed it is a channel by which water is led from its source to the user. Most aqueducts ran underground. However, if it became necessary to cross a valley or river, the aqueduct was elevated on a bridge of stone arches that enabled the water flow at a constant rate.
It was built at the end of 1st to early 2nd century AD by the Romans during their occupation of the Iberian Peninsula(southwest of Europe) to bring water from the Río Frío (Cold River), about 18 km away, to the city, requiring an elevated section in its last 1 kilometer (0.6 mi) from the Sierra de Guadarrama to the walls of the old town.
It is made of 20,400 large, rough-hewn granite blocks, joined without mortar or clamps.
Here the views of Aqueduct of Segovia: