Dolmen located near Plouharnel: Overall view

Dolmens are communal burial places with chambers of large upright stone slabs (megaliths) supporting large capstones, with or without an entry passage, and set in a mound of earth or stones. Most date from the early Neolithic period (4000 to 3000 BCE). Dolmens were usually covered with earth or smaller stones to form a barrow, though in many cases that covering has weathered away, leaving only the stone 'skeleton' of the burial mound intact. The term 'dolmen' originates from the Breton language for 'stone table'. There are several dozen remaining dolmen in Brittany.