For an early breakfast or coffee look to the main road (southeast of the church) where you will find a few bars that cater to early-to-rise pilgrims and early-to-work truck drivers.
The Iglesia de Santa María de la Asunción, located in the main square, is a radiant sight.
Market day is Saturday. The locals also celebrate their patron Santa María from August 14th to 20th.
Los Arcos, a village dating back to its Roman occupation, is laid out in long streets which run parallel to the río Odrón. Your approach along the camino brings you into the north side of town, and it was on top of the hills to the east (left on approach) that the castle once stood.
It is a frontier town (Logroño is near enough) and as a result it saw its share of both destruction (at the hands of land-hungry nobility) and prosperity (every border crossing meant paying a toll, and exchanging currency, and most likely paying a duty on your horse).
Exiting the town, you pass through the Arco de Felipe V and cross over the río Odrón. A few of the albergues in town are located on the west side of the river.