Artificial caves of Casal do Pardo - Credit: Wikimedia Commons
The four Artificial caves of Casal do Pardo (), also known as the Caves of Quinta do Anjo, were neolithic tombs. They are situated in Palmela municipality in the Setúbal District, of Portugal, about south of the capital of Lisbon. These caves were classified as a National Monument of Portugal in 1934. Read more on Wikipedia
Source: en.wikipedia.org