Esparragalejo Dam
The 928th tallest dam in the world
The Esparragalejo Dam was a Roman multiple arch buttress dam at Esparragalejo, Badajoz province, Extremadura, Spain. Dating to the 1st century AD, it is the earliest known multiple arch dam.
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).