Sil Valley in Quiroga Nature · Quiroga, Quiroga, Lugo Image of Quiroga, not of the place itself. The Sil crosses the concello's 319 square kilometres in a deep gorge and organises its entire geography: vines are grown on its terraces and the Romans worked its meanders in search of gold. Photo: José Antonio Gil Martínez from Vigo, Spain (CC BY 2.0) What to see and do in Quiroga