Castro of Vila Nova de São Pedro

The Castro of Vila Nova de São Pedro is a Chalcolithic archaeological site in the civil parish of Vila Nova de São Pedro, municipality of Azambuja, in the Portuguese Estremadura area of Lezíria do Tejo. It is important for the discovery of thousands of arrowheads within its fortified settlement, associated with the Chalcolithic period of human settlement, and in particular with the long-lived fortified town, or castro, of Zambujal, near the municipality of Torres Vedras.

Source: Wikipedia — Castro of Vila Nova de São Pedro (CC BY-SA 4.0)