Towards the Col de Peyresourde, the Oueil valley extends to the right to the Port of Balès, instead of regular Tour de France. Entire valley, calm and relaxing has remained wild and natural. In order to preserve all its charms, the buildings are now banned, pushing the renovation of buildings and barns. Because of its high concentration of deer, the Oueil valley is also called the valley of deer. In the fall, during the slab, we hear the deer until the valley floor, and the sound of their horns clashing in combat. The village of Bourg d'Oueil welcomes the small ski resort of the same name. Open a few days each winter, the slopes are ideal for families and tobogganing. Leaving the Oueil valley towards the Col de Peyresourde, the boundary between the department of Haute-Garonne and Hautes-Pyrenees, crossing the valley Larboust that begins in the village of Saint-Aventin.The road was constructed in the eighteenth century by a decision of Baron Antoine Mégret Etigny. As in the Oueil valley, the use of stone as the main building material gives a special charm to these mountain villages. Many Romanesque churches are scattered in the valleys of Oueil and Larboust. In Garin, the chapel of Saint-Pé-de-la Moraine, with its twin arches and marble Gallo-Roman date of the end of the tenth century. At Cazeaux de Larboust, the XIth century church has frescoes of the fifteenth century. But it is certainly in Saint Aventin found the most beautiful Romanesque church of the Central Pyrenees: built in the XIth and XIIth centuries, it bears small Gallo-Roman monuments embedded in its walls. Above, the ski resort of Peyragudes on either side of the neck Peyresourde is formed by the union of stations Agudes (slope Haute-Garonne) and Peyresourde (slope Hautes-Pyrénées). It offers 60 kilometers of descent in 17 tracks. At the bottom of the valley Larboust after crossing the village of Oo, the Granges d'Astau, 1 139m above sea level, is the starting point for many hikes at various levels. Among them, Lake Oo is a mecca Pyrenean accessible by walking the GR10 walking after 1:15 and 392m in altitude. Waterfall of 275m in height is one of its main attractions. The trail then continues to Espingo, Saussat and Portillon lakes. The water of Lake Oo through a long underground gallery of 11.700 km. After circulating in the penstock the water drives the turbines of the hydroelectric plant EDF. Commissioned in 1921, it is located at the exit of Luchon to the Col de Peyresourde. Lines still in operation, are original. Hydropower plant plays a regulatory role in the national production system and then runs only as needed electricity. Library Luchon organizes tours Valleys Oueil and Larboust and their Romanesque churches.The Tourist Office offers Gourmet Walks meet producers and guided tours of hydroelectric Luchon. For further information, or to register for one of these visits do not hesitate to contact the Library at 05.61.79.04.12 or with the Tourist Office.