old shaft in Peña del Hierro (Nerva, Huelva, Spain). The ...
Description: old shaft in Peña del Hierro (Nerva, Huelva, Spain). The origin of the famous river Tinto is in the vicinity...All this zone is famous because the Astrobiology work performed here. The zone has been considered a "Mars analog" on Earth and the study of extremophile organisms received a lot of attention here.