Mainau
Mainau is an island in Lake Constance.The owner of the island is the Swedish Lord Bernadotte. It is one of the main tourists attractions of Lake Constance. Beside flowers, there is a great park landscape with beautiful views on the lake. There is also a greenhouse with tropical climate and thousands of butterflies in it.
In summer you will see lots of small sailing boats. The Mainau bay is where the university sailing club is located.