The catamaran trip through the Sil canyon is the defining experience of the Ribeira Sacra. The boat departs from the Embalse de San Estevo dam and travels the length of the most dramatic section of the gorge, where sheer walls drop 500 metres to green water and the terraced vineyards cling to angles that look impossible for cultivation. Monasteries appear on the heights above: Santo Estevo, now converted to a parador, and Santa Cristina de Ribas de Sil are the most prominent.
Trips typically last around two hours each way and run from spring through autumn. The morning light is better for photography on the western wall; afternoon trips catch the terrace vineyards in golden light from the east. Book ahead in summer. Boats depart from Os Peares or from the jetty near the Monastery of San Estevo — check with the operator for current departure points.