Anta do Alto da Toupeira - Credit: Wikimedia Commons
The Anta do Alto da Toupeira, also called the Anta da Toupeira or the Anta de Salemas, is a Neolithic dolmen, or megalithic tomb, situated in the parish of Lousa in the municipality of Loures, in the Lisbon District of Portugal. It dates back to the Chalcolithic. Read more on Wikipedia
Source: en.wikipedia.org