Saint Yves is the main dive site for all diving clubs of Bordeaux. This is a great place for dive training and orientation. You can reach several wrecks, the easyest is named 'Cote bleu'.
With a dive site map, and a good orientation sense, you can try to reach other wrecks... The Marie Noelle (N), the two east wrecks (NE), and several others.
The deepest place is Saint Yves whole (the false one), at hight tide you will find around 30m deep. This is the deepest place of the whole Arachon bay.