Necrópolis de Alcalar (Megalithic Tombs)

Necrópolis de Alcalar preserves one of the most important groups of Chalcolithic (Copper Age) megalithic funerary monuments in southern Portugal, with tombs dating from around 3000 to 2500 BC and continued use into the Bronze Age. The site comprises several tholoi, corbelled circular stone burial chambers built from unmortared slabs and covered by earthen mounds (mamoas), reached through long stone-lined entrance passages. Excavations beginning in the early 20th century and continuing intermittently since have recovered ceramics, stone tools, and human remains indicating the tombs served the local farming communities of the period over many generations, with successive burials and grave goods added over centuries. Tomb 1, the largest and best preserved, retains its full corbelled chamber and entrance corridor and can be entered by visitors. An on-site interpretation centre displays finds from the excavations and explains the construction techniques and social context of the megalithic culture that produced monuments across the western Algarve and southern Iberia. The site sits in open agricultural countryside rather than an urban setting, and conservation work has focused on protecting the exposed stonework from weathering while keeping the tombs accessible rather than fully enclosing them.