Eslonza Valley Nature · Villasabariego, Esla-Campos, León Image of Villasabariego, not of the place itself. The Eslonza valley is a León region formed by the lands carved by the river Eslonza, also called río Moro, which rises in the Campazas valley and flows into the river Porma next to the Villarente bridge. It stretches between the present-day municipalities of Gradefes and Villasabariego, running through the hills that separate the valleys of the Esla and Porma rivers, and includes the settlements of Mellanzos, Santa Olaja de Eslonza, Villarmún and Palazuelo de Eslonza. On its slopes are preserved the so-called hermit caves, hollows dug into the clay banks of the valley. Photo: FLAVIVSAETIVS (CC BY-SA 4.0) What to see and do in Villasabariego