The pond of Tréauray is a reservoir on the river Loc'h, permitted by the presence of a dam. Covering 23 hectares, it presents an interesting population of white fishes (roach, bream, carp ...), and pike. A path in the undergrowth can go along one bank of the pond. Near the pond are the Ecomsée Saint-Degan, and the mill of Estaing, which is from the 15th century. Fishing in the Tréauray pond requires a fishing license.