My other advise would be, get an apartment
My Brother was in Paris for Christmas, and he stayed in an apartment, said he would never do a hotel again
Montreal, great city, cold cold cold, but a lot of fun. Of course I have only been in the winter.
that Baltic sea would be still to cold to swim in it
that is something I didn't even think of (swimming/beach)
I studied in England @ Trinity College, only got to Spain and Italy, along with all over the UK, but didn't get to travel nearly as much as I would have liked.