La Laguna Negra Nature · Vinuesa, Pinares, Soria The Laguna Negra de Urbión is a lake of glacial origin set at the foot of a cirque with vertical walls in the Picos de Urbión, within the district of Vinuesa (Soria), at the heart of the Pinares district and of the natural park declared in 2010 that bears its name. It lies at 1753 metres above sea level, alongside other lakes of the same origin such as the Helada and the Larga, and is reached from Vinuesa via the Revinuesa valley, on foot or by bus on days of highest visitor numbers. Its dark waters, where birds of prey nest, fed legends of a bottomless depth linked to the sea by underground caves, recorded by Machado in La tierra de Alvargonzález, although in reality they do not exceed eight metres in depth. On the first Sunday of August a swimming crossing is held. Photo: LBM1948 (CC BY-SA 4.0) What to see and do in Vinuesa