The 16-hour trip between the two northern European cities is a festive summer ritual, with plenty of singing, gambling, limbo contests and maybe a bit too much to drink.The 16-hour trip between the two northern European cities is a festive summer ritual, with plenty of singing, gambling, limbo contests and maybe a bit too much to drink. Summer (Season), Ferries, Travel and Vacations, Baltic Sea, Helsinki (Finland), Stockholm (Sweden) Read More