Coordinates: 42.2570210000, 3.1971740000 (map)
The dolmen Creu d'en Cobertella is the largest dolmen in Catalonia, dating back to 3000-3500 B.C. Discovered in 1975, it was hidden inside a round stone mound, typical for burial grounds of the late Stone Age. During the excavations, the archeologists also discovered human remains, ceramic pieces, and the Roman coin onsite.
The dolmen is formed by large gneiss plates. Two chambers that are present in the structure had most likely also had a stone hallway leading up to them, but it hasn't survived to the modern day.