Castle-abbey of Montearagón Monument · Quicena, Hoya de Huesca, Huesca A fortress and royal monastery that Sancho Ramírez had built around 1085 on a hill facing Huesca in order to harass the Muslim city. It functioned until the disentailment of 1835 and today, in ruins, it preserves the keep and part of the enclosure. A Monumento Nacional (Spain's heritage designation in force until 1931) since 1931. Photo: Millars (CC BY-SA 3.0 es) What to see and do in Quicena