Bridge of Sant Martí de Boí Monument · la Vall de Boí, Alta Ribagorça, Lleida Image of la Vall de Boí, not of the place itself. One of the oldest bridges in the Vall de Boí (Alta Ribagorça, Lleida), in the hamlet of Boí. It crosses the Sant Martí river, on the old road that led to Durro, and has undergone reconstruction. It is described as a very old small stone bridge, visible within the medieval street layout of the village. Photo: Josep Domènech i Sàbat (Public domain) What to see and do in la Vall de Boí