The wisenheimer in me wants to make some sort of double entendre' crack based on the title of your post, but since you are probably serious, I'll leave it alone.
Since you are pretty new divers, I'd recommend staying inside the harbor. There is a wall dive off the Race that you may want to visit some time in the future. It is a drift dive that drifts you over large expanses of sand. There is not a lot to see on this dive except there are toilets scattered everywhere. (No, I'm not kidding.) And just like in a box of crackerjax, there is a prize inside the toilets usually in the form of a large crusteascean. Sounds cool right?
THe drawbacks are many. Current, and a lot of it, can bring you to the bottom of the wall if you aren't watching carefully. Since the bottom is 180 feet away, you probably don't want to go there. Plus, incureing an unexpected deco obligation on an AL 80 is never a good feeling.
Fog can and does roll in in the blink of an eye, seperating you from your chase boat if your captain isn't careful. Surfacing and looking around and seeing nothing but gray can really bum you out.
If you haven't drift dove before, the open ocean isn't the place to try it out for the first time.
There are a few wrecks inside the harbor, but (reportedly) the vis sucks and they are falling apart.
PTN