The Arevalillo valley Nature · Nava de Arévalo, La Moraña, Ávila The Arevalillo here marks the boundary with Tiñosillos before flowing into the Adaja at the foot of Arévalo. On its banks the cereal countryside meets the stone pine woods that announce the Castilian Tierra de Pinares. Photo: David Perez (CC BY 4.0) What to see and do in Nava de Arévalo