Tegan2 - nothing better for walking, cycling, swimming in lakes, canoeing, etc, than 'my' Jura mountains, French or Swiss side- and such easy access by car from UK. If anyone ever want advice about this region, happy to help. Can even do B&B - own wing, own super shower room, own kitchen and lounge, etc- with or without guiding, or even French course ...
But Lake Bled is defo on my list for the near future. My mother went there when it was still a private Island, in the old days of the former Yugoslavia, when she was 16 and 18 - and I have tons of photos. I think the most beautiful time there would be October though.