Festivities of invierno de Ansó Activity · Ansó, La Jacetania, Huesca Image of Ansó, not of the place itself. Ansó's winter festival is held in the town known for its traditional costume, one of the most distinctive in the Aragonese Pyrenees, and for the ansotana sheep, a breed covered by the Ternasco de Aragón. Photo: Manuel Velazquez (CC BY 3.0) What to see and do in Ansó