Cornalvo Dam

Cornalvo Dam - Credit: Wikimedia Commons

The Cornalvo Dam is a Roman gravity dam in Mérida, Badajoz province, Extremadura, Spain, dating to the 1st or 2nd century AD. The earth dam Roman concrete and stone cladding on the water face is still in use. Read more on Wikipedia

type: dam
date from: 1st–2nd century

Source: en.wikipedia.org