Aínsa is one of the most beautiful medieval villages in the Spanish Pyrenees, perched on a hilltop above the confluence of the Cinca and Ara rivers in the Sobrarbe comarca of Aragón. The lower, modern part of town is unremarkable, but climb the hill and you arrive in one of the finest old quarters in northern Spain.
The Plaza Mayor is enormous — a vast, arcaded square of honey-coloured stone surrounded by cloister-like porticoes, with the Romanesque church of Santa María at one end and the castle at the other. Two steep parallel lanes lead down from the square through the old town, and the views from the castle ramparts extend across the river valleys to the snow-capped peaks beyond. Aínsa makes a natural base for visiting the Ordesa y Monte Perdido National Park, one of the great mountain parks of Europe, which lies a short drive to the north. The Cañón del Añisclo and Valle de Pineta — two of the park's four main valleys — are both more easily reached from Aínsa than from the northern approach via Torla.