Gorge pierced by the Mataviejas river between limestone walls that you can cross thanks to a suspension bridge and that is part of the Sabinares del Arlanza y la Yecla Natural Park.
The Peñas de Cervera create a deep and narrow gorge where riverside plant species live, such as poplars, junipers, ash trees, poplars and willows, accompanied by an undergrowth of pines, brambles, honeysuckle, dog roses or elders. In addition, it is normal to see vultures that nest on the steep slopes of the gorge - more than 100 pairs -, and roe deer, and less common wild boars, foxes, hares, wolves, golden eagles, hawks and aquatic species such as otters, frogs, kingfishers. , the dipper or the crab.
It can be covered on foot, starting at the Desfiladero car park, or from Santo Domingo de Silos using the agricultural road, which runs parallel to the Mataviejas river, as a nature trail integrated into the protected area. In total there are 3.5 km, being 1.5 the most abrupt with a walkway for the narrowest part. Another 155-meter walkway that crosses the San Miguel Gorge, in a more open area, allows us to enjoy the abundant vegetation.