I can vouch for the port hangovers! When I was there earlier this year, I plowed a couple bottles a day along with regular wine and other libations on top! Met a gentleman at a restaurant one evening that ran one of the major port houses along the river in Porto. Invited there for the grand tour the next day. Needless to say, that put a hurting on me! Worth every minute though!
Never really paid attention to ports before, but there are some nice ports coming out CA and other parts of the northwest