Slow things down at Merian Park. Kick back with a good book or lie on the cool grass to rest for a while.
You're spoiled for sightseeing choice in Munchenstein. Merian Park is a great place to begin here, but there are loads of other worthy spots to experience. Basel Zoo, Basler Muenster, and Beyeler Foundation are not far from the recreation and green space and will top off your day nicely.