Mainau is a picturesque island located in Lake Constance, Germany. Known for its stunning gardens and diverse plant species, it attracts visitors year-round. The island covers about 45 hectares and features a mild climate, which allows for the growth of exotic plants. The island is also home to the Mainau Palace, a baroque structure that dates back to the 18th century. Visitors can explore various themed gardens, including a rose garden and a tropical greenhouse. Mainau is accessible by boat and offers recreational activities, making it a popular destination for nature lovers and families.