Large rock art sanctuary, with several phases of occupation, from the Palaeolithic to the Iron Age; most of the monuments seem to be discontinuously distributed along more than sixty kilometres of the course of the Guadiana River, between Ponte da Ajuda, upstream from Juromenha and slightly downstream from the mouth of the Álamo Stream; this nucleus is currently submerged under the waters of the Alqueva dam. However, there are also some small nuclei that have been preserved, downstream from the Alqueva, contiguous to Pulo do Lobo, in the municipalities of Serpa and Mértola.