Vierwaldstättersee/ Lake Lucerne (Backblip 2)
We did a gorgeous steam boat lake cruise which lasted 5 1/2 hours with meal included. The weather was fabulous. The lake has a rather complex shape with sharp bends and four 'arms'. So interesting to visit all the various ports and get more people on the boat and let some off. I was all over the place taking photos from different decks and angles! Never bored for a moment.
Extra: sparkling water and a lake surrounded by mountains.