The Balkans are covered with Karst formations: limestone, dolomite, and gypsum formations worn away by water. In central Croatia there are some particularly impressive Karst formations called Plitvička jezera.
We had heard many good things about this national park. Numerous people had spoken with us about the park. One had even told us how to sneak into it.
Because we are cheap - seriously - we did manage to sneak into it. We parked on the far side of the park and walked in. It really wasn't so difficult, and we had absolutely no trouble while walking around the park.
The park is magnificent. We spent a few hours walking the different parts of the park.