Portugal · General Knowledge · Hard
Answer: A megalithic dolmen (passage grave) — The Anta Grande do Zambujeiro is one of the largest megalithic burial chambers in the Iberian Peninsula, dating from around 4000–3500 BCE.
The Anta Grande do Zambujeiro is one of the largest megalithic burial chambers in the Iberian Peninsula, dating from around 4000–3500 BCE.