The Almendres Cromlech is one of the largest and most ancient megalithic sites in Europe.
The Cromeleque da Portela de Mogos is an impressive megalithic monument.
Vale Maria do Meio Cromlech is a significant megalithic complex.
The Xerez Cromlech is an ancient megalithic complex near the village of Monsaraz.
The Msoura Stone Circle is an impressive alignment of large megaliths.