Archaeologists have pieced together the story of two monumental stone tombs on Cape Trafalgar, on the coast of Cádiz in southern Spain, and found that they were used as communal burial places for roughly two centuries, from about 1875 to 1625 B.C. The research, led by Eduardo Vijande-Vila of the University of Cádiz, rests on radiocarbon dating of the human bones recovered from inside the structures.
The tombs were built at a time when the people of the region had already begun burying their dead in individual graves. The shift makes the monuments a striking choice: rather than returning to shared burial, the builders chose to place many people together in large stone structures, and the bones show how those spaces were used over time.
The first tomb, known as Tomb I, has an oval chamber cut into the rock, a slab-lined passage and a roof of capstones. After its use ended, it was sealed with a stone wall and a slab and then covered by a mound of earth. Remains of at least 13 people were found inside. Tomb II has a circular chamber whose dome has collapsed, and a central pillar was added to support it. At least seven individuals were identified there.
The bones were not left in their original positions. After the bodies decomposed, the remains were rearranged, a practice that suggests the tombs were revisited and tended. One exception stands out: a young woman was found in an articulated position, meaning her skeleton was still in its natural arrangement. Her burial is dated as the last one placed in Tomb I before it was sealed.
Grave goods recovered from the tombs include gold earrings, silver beads, an ivory comb and an arrowhead, objects that help give a picture of the personal belongings buried with the dead. The researchers note that some questions remain open. Luminescence dating could show whether the tombs were reused or whether parts of them were built later than the bone dates suggest, and those results would refine the timeline for the sites.