Tena Valley
…by the Gállego river from north to south. Its main town is Sallent de Gállego. The valley is surrounded by 3 kilometres (1.9 mi) high mountains, like Balaitus, La Gran Facha or Los Infiernos. The towns that form part of the valley are: Sallent de Gállego including the ski resort of Formigal, Lanuza, Escarrilla…