If being by the water is a major draw, Plage de Pont Roux is a spot you might want to check out when visiting central Becleguer. Catch the sunset by the shore at plage naturiste and Plage de Maez-an-Aod, located nearby.
Sightseeing doesn't have to be expensive. For some things to do in Ploulech, explore and snap photos of landmarks like Pink Granite Coast or Plage de Pont Roux.