The traditional cutting of the holly Curiosity · Arévalo de la Sierra, Almarza, Soria Image of Arévalo de la Sierra, not of the place itself. For centuries livestock sheltered in the sestiles and the branches with red fruit were cut for Christmas decoration; today that use is still allowed but regulated within the nature reserve. Photo: Jonroman (CC BY-SA 3.0) What to see and do in Arévalo de la Sierra