16-3249 - Neolithic burial chamber built between 4000 and 2000BC for communal burial of the dead, it would originally have been covered with earth or stones, Bodowyr Burial Chamber, Anglesey, North Wales, United Kingdom, Europe
511-6082 - Citania de Briteiros, a Celtic iron age settlement dating from approximately 300 BC, with foundations of 150 huts, funerary chamber with carved doorway, near Braga, Minho, Portugal, Europe