Get your fix of vitamin D at Plage Thiers. After you've worked on your tan, stick around and watch the sky change color as the sun begins to set.
You'll soon see why this Arcachon stretch of coastline is popular with travelers. If you're looking for more to explore, Dune of Pilat, Arcachon Beach, and Aqualand Bassin d'Arcachon are in the area as well. They won't take very long to get to from Plage Thiers.