We'd like to travel by train from the UK next summer for a couple of weeks at one of the "middle European" lakes. Obviously we'll have to account for train tickets being higher in some countries but assuming all were equal, where would you head for? Annecy? Konstanz? Maggiore? Lucerne? We went to Garda and Idro years ago and loved it, but I'm hoping the further north we stay, the less intense the heat will be 😁😱