Located just below the southeast shore of Lake Rusałka, Poznań's lovely Botanical Garden boasts a vast 22 hectares and over 7,000 varieties of plants from almost every kind of climate and ecosystem in the world. Impeccably maintained, the garden is both a recreational and educational park owned by the Adam Mickiewicz University in Poznań, and its history dates back to 1922 when it was only a 6 hectare plot. The park includes several greenhouses, a snazzy two-storey exhibition pavilion with a gallery, shop, and cafe, several enormous standing stones they took great trouble to bring here, and a lovely ballerina fountain designed by Margaret Węcławska - a graduate of the Poz Academy of Fine Arts. Absolutely worth visiting on a nice day, though note that it is quite popular on weekends. Getting there is a complex cocktail of trams and buses, so just take a cab.