The JC Penny Outlet store would be cool just for the architecture. Would be hard to find a time without a ton of people there though.
The convention center could work out sometime. My # is available if anyone ever wants to get a group to go down there (need some people with CCWs).
I always thought that the train tracks and grafitti down by the convention center would be cool at night. Wouldn't go there alone or even with one other person though.