Sierra and Canyons of Guara Nature · Bárcabo, Sobrarbe, Huesca The Parque Natural de la Sierra y los Cañones de Guara, in the province of Huesca, extends across the districts of Alto Gállego, Hoya de Huesca, Sobrarbe and Somontano de Barbastro, with Bárcabo among the municipalities it covers and its northern boundary in Sobrarbe. With 47,453 hectares and a peripheral protection zone of a further 33,286 hectares, it is the largest natural area in Aragon, with altitudes ranging from 430 metres at the Alcanadre river to 2,077 metres at the peak of Guara. Its geology, well suited to canyoning and climbing, makes it a world reference for these sports, with canyons such as that of the Balcés river, more than 20 kilometres long. It was declared a natural park in 1990. Photo: Deivid (CC BY-SA 3.0) What to see and do in Bárcabo