Oh a ship grave yard would be neat. There was something similar in FF11 in the Aht Urgan expansion. I don't remember the name of the area itself but it was a few scattered rocky islands/caves that were connected by old ship wrecks. It was where the Lamia lived and there were undead all over the place. There was even a 'hunt' that would spawn on top of you if you died (much to the distress of your party!). And yes, there was fog, lots of fog.