Although there is no actual cathedral near Point Lookout called "Ark & Dove", there is a real Ark and Dove Presbyterian Church further north in Odenton, MD. The "Ark" and the "Dove" were the first two ships that brought settlers to Maryland in 1634.
ps3pcxbox360 When entering the cathedral and talking to Nadine immediately, (and select all of the dialogue options) the cathedral may become locked. As there is no key, this is problematic. This also happens at random if returning to the mainland with Nadine and then returning to the cathedral. [verified]