I think Lauri and Marcie are spot on about overlooking the "tourist" things on our home turf.
AshD, wow, you and Keith "collect" prisons! Mark and I are far more mundane only "collecting" wineries (and wine). Don't know if Alcatraz will be the jewel in your crown, but it will be unique as an island (unless you've already collected Robben Island, and Devil's Island and...).