This ancient town stands between Estella-Lizarra and Viana, crossed by the river Odrón. It was a favourite place of the Kings of Navarre. 

An important stopover point on the Pilgrim's Way to Santiago, every corner of the town is a fine blend of history, art folklore and gastronomy. The Pilgrim's Way runs along the calle mayor (main street), which is full of hospitals, inns and noble buildings that reflect the prosperity enjoyed by Los Arcos thanks to its strategic location as a junction and the constant flow of pilgrims.

The centre is mediaeval with long parallel streets; it used to be surrounded by walls, which were re-used in later constructions. 

Two gates remain to recall the fortress role of the town: 'Estanco' and 'Castilla', in the form of a triumphal arch. Then there is the rich and spectacularchurch of Santa María, one of the most surprising examples of Navarrese Baroque.

Between 14th and 20th August the town's festivities are held in honour of Our Lady of the Assumption and San Roque. Encierros (bull runs), capeas (amateur bullfights) with steers, music and fireworks liven up the town during that week.

On the Sunday before the festivity starts the town is home to a traditional handicrafts fair.