We paid 19 TL pP for the little museum. We were asked if we want a boat trip (1000TL for 2 people and 2.5 hours). We prefered walking alone, was no problem in april, although there is a sign saying guides are mandarory. We saw turtles, flamingos, storks, horses, frogs, ducks... You can walk 3-7km. Very nice walk with mountain views and interesting nature. Did not stay overnight.