Between the town of San Miguel de Bernuy and Villa de Fuentidueña, the Duratón River has excavated a deep canyon filled with the waters of the Las Vencias reservoir. The spectacular views of the cliffs that the river has been tracing in its path, are mixed with the remains of an old fortress, a hermitage and a convent. There are vultures and we can see griffon vultures in their majestic flight. Among the activities that this attractive place offers us is sailing in a canoe or canoe from San Miguel de Bernuy to the end of the reservoir, enjoying the silence and delighting in the observation of nature.