Festivities of Borau Activity · Borau, La Jacetania, Huesca Image of Borau, not of the place itself. Borau's festival is held at the gateway to the valle de la Garcipollera, one of the Pyrenean valleys of greatest natural value, reached from Castiello de Jaca. Photo: Viquipèdia (CC BY 2.0) What to see and do in Borau