Castro of Monte Mozinho
Oldrões, Portugal
The Castro of Monte Mozinho (Povoado fortificado de Monte Mozinho/Cidade Morta de Penafiel) is a Neolithic fortified settlement, sometimes referred to as the Dead City, situated in the civil parish of Oldrões, in the municipality of Penafiel in the Tâmega Subregion of the Portuguese district of Porto.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).