If Plitvice Lakes isn’t on your bucket list, add it now! Cale and I rented a car and drove from Istria to the lakes and had a wonderful time. September was a great time to visit- we could see the trees starting to change color but it was still nice and warm outside. I assume that in the summer the park is teeming with visitors; it was crowded when we visited but if you go early in the day you can miss a lot of the crowds. The park is gorgeous. The only downfall: you’re not allowed to swim in the lakes :).