Limestone quarries of Triacastela Nature · Triacastela, Sarria, Lugo Image of Triacastela, not of the place itself. The limestone outcrops in the parish of Vilavella, at places such as Os Cotelos, A Pedra and O Penedo, are among the few in Galicia; from them came the stone used to make lime for Santiago cathedral. Photo: José Antonio Gil Martínez from Vigo, Spain (CC BY 2.0) What to see and do in Triacastela