sardinia. gonnosfanadiga. archeological area of san cosimo. front of the tomb of giants grutta de santu juanni, 2nd millennium bc

2nd ancient arburese archaeological archeological architecture area boulder burial circle civilization cliff cosimo entrance exedra flower geology giants gonnosfanadiga grass grotto grutta heritage hill historical history island johns juanni landscape landscapes mediterranean megalithic millennium monuments mountain nature nuragic people plant prehistoric region rock ruins san santu sardinia sardinian shardana sites soil stones terrain tomb tree valley wall wilderness