Bring your swimwear and goggles to Wallbach Bad and hop on in! Whether you're in need of a bit of a workout or just want to play around, you're sure to have a ball.
You'll have no end of sightseeing choices in Lenk. Wallbach Bad is a good place to start here, but there are lots of other fine spots to experience. Engstligenalp Gondola Lift, Hahnenmoos Gondola, and Rinderberg are not far from the family-friendly swimming complex and will top off your day nicely.