Festivities of Villanúa Activity · Villanúa, La Jacetania, Huesca Image of Villanúa, not of the place itself. Villanúa's festival is held in a village documented since 992, next to the Cueva de las Güixas and the Grutas de Esjamundo, which houses an underground lake, that of San Lorenzo. Photo: France64160 (CC BY-SA 3.0) What to see and do in Villanúa