On the hillside of Montanha d’Uishèra lie the two population centers of Arres. Arres de Jos, or lower Arres, has a small and beautiful Romanesque church from the late 11th century dedicated to Sant Fabian.
Halfway to the upper settlement, Arres de Sus, there is the common parish church of Sant Joan, built in the early 19th century during a period of expansion, to accommodate the inhabitants of both settlements.