If you go to Hannover, it is well worth a visit
In the heart of downtown, you can find one of the most famous European Baroque gardens: Herrenhausen Gardens. They are royal gardens, featuring lakes, palaces, mazes, ponds, fountains, etc.. These gardens are formed by the groben Garten (a French Baroque style garden), Georgen Garten (English garden), Berggarten (mountain garden) where you can see a greenhouse with tropical plants and Welfengarten (French garden Monbrillant which belongs to the old castle. Nowadays it houses the University of Hannover. It is free to enter and at certain times of the day they turn the fountains on. In summer they hold performances, concerts and fireworks.