Mainau Island in Lake Constance, Germany is known as a "flowering island" notable for its beautiful botanical gardens and parks. The island features over 500 species of trees, 200 varieties of rhododendron and azalea, and 500 varieties of roses grown in its Italian Rose Garden. Mainau Island is a popular tourist attraction, receiving over 1.2 million visitors annually who come to see the abundant flowers like tulips, orchids and hydrangeas that bloom in the spring and summer months.