Preview Mertola on the banks of Rio Guadiana in the Alentejo. Europe, Southern Europe, Portugal, March Image ID: 746-88193 Artist: Cubo Images/robertharding Purchase a commercial license Buy framed prints & more from our print store alentejo attraction baixo alentejo castle europe harbour town horizontal iberian peninsula idyllic landscape medieval mertola middle ages moorish morning old town portugal reflection rio guadiana romantic southern europe spring stronghold town urban western europe white