Petroglyphs of Monte Farelo Curiosity · Antas de Ulla, Ulloa, Lugo On the flat slabs of the Farelo slope fifty-four rock engravings with cup marks, circular combinations, spirals and labyrinths have been inventoried, twenty-two of them located in the 2003 campaign; they are considered among the best-preserved inland rock art groups in Galicia. Photo: Satna (CC BY-SA 4.0) What to see and do in Antas de Ulla