Anonymous
I highly recommend the Georg-Miesgang-Hallenbad - there are always two lanes set aside for lap swimming (50m) and they are clearly marked for lap swimming only. The swimmers here know how to circle-swim and the lanes are open for lap swimming all day,from 9:00 AM to 10:00 PM. Additionally, after your workout you can relax in the sauna, steam room, or outdoor warm salt water pool and allow the high-pressure water jets to massage your tired muscles. There is also a restaurant in the wellness area.