Many of the activities on this list require a pair of walking shoes or getting wet in the lake, but you could spend an unforgettable couple of hours on Windermere without having to move a muscle.
The company Windermere Lake Cruises has a busy timetable of trips on old-fashioned steamers or modern sightseeing vessels.
If you just need an introduction to the lake, 45-minute cruises depart the pier at Bowness every half hour in summer.