Anta de Carcavelos - Credit: Wikimedia Commons
The Anta de Carcavelos, located close to the village of Carcavelos near the town of Lousa in the municipality of Loures in the Lisbon District of Portugal, is a stone age dolmen (burial chamber) or megalithic monument from the Chalcolithic period. It is one of many such tombs that have been identified in Portugal. Read more on Wikipedia
Source: en.wikipedia.org