Necropolis of Carenque - Credit: Wikimedia Commons
The Necropolis of Carenque () is an archaeological site consisting of three well-preserved late Neolithic collective sepulchres or tombs, dating back to about 3000 BCE, which are dug into smooth limestone outcrops. It is situated in the municipality of Amadora in the Lisbon District of Portugal. Read more on Wikipedia
Source: en.wikipedia.org