Just one remark. Krka waterfalls (Skradinski buk) is the most beautifull, but also the most crowded part of National Park. Go there in the early morning - before rush starts. You need 2-3 hours to see everything there, and then escape from rush, take a car and go to ROSKI SLAP, VISOVAC, MANOJLOVAC, ARANDJELOVAC MONASTERY; BURNUM or some other place in the park.
You can't enjoy full beauty of nature surrounded by 10.000 people. And other places are less crowded, or even perfectly calm if you know where to go.
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