Sima de las Palomas ("Rock-Dove hole") is on Cabezo Gordo, located between Balsicas and San Javier in the Murcia region of Spain.

The shaft was filled in with brecciated material in the Late Pleistocene, and was partly excavated by miners in the nineteenth century.

It is a vertical shaft in karst, in the Cabezo Gordo hill, and overlooks Mar Menor, a saltwater lagoon in the Mediterranean.

It was filled with brecciated material in the Late Pleistocene, much of which was removed by 19th-century miners[1] who dug a horizontal tunnel toward the shaft, excavated much of it and left the rubble remains on the hillside.

[7] According to the authors of the 2008 study "Late Neandertals in Southeastern Iberia: Sima de las Palomas del Cabezo Gordo, Murcia, Spain", the findings confirm the late occurrence of Neanderthals on the Iberian peninsula, and "suggest microevolutionary processes and/or population contact with contemporaneous modern humans to the north".