Come here and get a very impressive view over one of Germany's biggest cities and leading financial centre.
Main Tower opens at 10 a.m. in the morning. It is very popular and gets crowded from midday on. Best time for a visit is from 10 to 12. If possible avoid weekends.
Opening hours: http://www.maintower.de/en/obser...
Best months are from April to August with a huge variety of amazing blooming flowers. However, worth a visit any season. Can be crowded on weekends during the summer. If you visit in summer, you definitely shouldn't miss the Rose and Light Festival (Rosen und Lichterfest): For one weekend in June thousands of lights illuminate the garden!