On the Bastides and Castelnaux road leading from Auch to Marciac, make a stop during your journey at the Donjon de Bassoues. Located in Astarac, in the heart of the Bastide town of Bassoues, this masterpiece of 14th century military architecture, which stands out from afar, will not leave you indifferent. Dominating the bastide from its 43 m height, the keep has a defensive and residential architecture with beautiful Gothic rooms, a spiral staircase of 197 steps serving the summit platform, crowned with a magnificent machicolation. Remarkable for the quality of its building (local stone), the attention paid to details (floors highlighted with drip edges, moldings, etc.) and the comfort of the rooms (latrines, fireplaces, stone sinks, etc.), it is the one of the best preserved dungeons in the southwest. Climb to the top of its 43 m. You will be rewarded with a grandiose panorama of the countryside, the hillsides of southern Gers and the Pyrenees. Also worth seeing are the village ramparts, the market hall, the covered areas, the Church of the Nativity and the Saint-Fris basilica.