Swimming in Lake Constance is a great experience, with plenty of amenities and easy access. It's free of charge, and there's a large area with outdoor games. There's a restaurant for food and ice cream, and there are WCs, showers, and drinking water taps available. There's also a place to change clothes, although the lockers appear to be permanently locked. You can get there by bus or bike, although parking can be a problem. Be aware that it can get quite crowded in good weather. Check the timetable for bus line 5, which isn't easy to find online, not even on Google Maps. Bus line 5 stops near McDonald's at the main station and right at the restaurant entrance in Horn. The DLRG German life saving team is also present, and it's recommended to wear swim shoes as the beach is made of stone.