Niebla is a town and municipality located in the province of Huelva, in Andalusia, southern Spain. It lies on the banks of the Rio Tinto, 30 km from Huelva and 60 km from Seville.
According to the 2008 census, it has a population of 4,200 inhabitants. A 2-km town wall surrounds the perimeter of the town. The Alcazar or castle dates mostly from the 15th century. Just outside the town a Roman bridge, still in use today, crosses the Rio Tinto.
Wikipedia https://en.wikipedia.org/wiki/Niebla,_Spain
Coordinates 37°21'39.436" N -6°40'45.658" E
