Huelva is a city in southwest Spain that has frequently featured in the search for Tartessos. Adolph Schulten(a) as well as Jorge Bonsor devoted years to studying Huelva, Cádiz and Seville in their search for the legendary city. Even if Tartessos is conclusively identified, it is still a long way from proving it to be Plato’s Atlantis, which after all is supposed to be submerged. I was recently offered satellite images that purported to show traces of ground features that ‘might’ indicate ancient ruins with a remote possibility that they might be part of Tartessos!
(a) https://www.uv.es/~alabau/situacion.htm (Sp) (link broken Mar 2019 See: https://web.archive.org/web/20161217151230/https://www.uv.es/~alabau/situacion.htm