Wind in your hair, the smell of summer forest and many happy, surpising sights like this yellow bike by the route in Äitsaari are some of the memories you can take away from cycling in Finland. Here are two examples + a map-link for many more:
1) The Saimaa Cycling Route runs through Ruokolahti, Taipalsaari, Lappeenranta, Joutseno and Imatra. Length 156 km. See more on the dedicated Saimaa Cycling Route -page or on separate cycling pages here.
2) The Four Island Cycling Route takes you through beautiful archipelago sceneries in Imatra and Ruokolahti, 52 km. See more info here.