The Megalithic Monuments of Alcalar are part of a vast archaeological site, with megalithic funerary temples, built and used over several centuries, in the Chalcolithic period.

Composed of a set of graves spread over an area of ten hectares, the necropolis has been classified as a national monument since 1910. Factors like the wide range of subsistence resources provided, among other activities, the fishing and seafood exploitation of Ria de Alvor have contributed to the perpetuation of human occupation in this area, reads the General Direction for Cultural Patrimony (DGPC) website.

According to the DGPC, the set of Alcalar Megalithic Monuments is one of the most important and visited archaeological places in the Algarve, due to the funerary structures and the large number and relevance of the objects found.