🇪🇸 Spain · Megalith
Dolmen de Viera
Neolithic – Early Copper Age (c.3850–3000 BCE) · Antequera Chalcolithic / Alcoreños
Antequera World Heritage (70 m from Menga) — 21 m corridor dolmen with 27 orthostats and equinox orientation.
🇵🇹 Portugal · Ancient city
Castro of Zambujal
Chalcolithic – Early Bronze Age (c.3000–1700 BCE) · Vila Nova de São Pedro / Bell Beaker (Estremadura)
Atlantic Copper Age hilltop proto-town (3000–1700 BCE) with walls, bastions, barbican and Bell Beaker metallurgy.
🇵🇹 Portugal · Ancient city
Castro of Vila Nova de São Pedro
Chalcolithic (c.3000–2000 BCE) · Vila Nova de São Pedro (Iberian Chalcolithic / Bell Beaker)
Iberian Chalcolithic type-site (3000–2000 BCE) — three-walled fortified settlement with bastions and copper workshop on Tagus plain.