🇵🇹 Portugal · Megalith
Anta Grande do Zambujeiro
Late Neolithic to Chalcolithic · Alentejo Megalithic / Évora group
Iberia's largest dolmen near Évora — seven 8 m pillars with 12 m corridor, 4000-3500 BCE.
🇵🇹 Portugal · Megalith
Antas de Olival da Pega
Early Neolithic – Chalcolithic (c.3500–2800 BCE) · Alentejo Megalithic (Almendres tradition)
Reguengos twin antas in shared mound — Anta 1 with 16 m corridor, 4 m polygonal chamber and schist plaques (3500 BCE).