stones and bushes on a hill by the mondego river, penacova portugal

stones bushes hill mondego river penacova portugal bookstore cliff mountain erosion scenic vacation village landmark summer valley quartzites sandstones sedimentology countryside environment destination tourism trail reflected mirrored reflection outdoor nature travel elevation geology escarpment landscape natural stone quartzite monument geological feature buçaco bussaco range library bank livraria formation rock coimbra portuguese europe its banks vegetation called do