Both of these parks, Krka and Kornati, have astonishingly well preserved flora and fauna, but they represent completely different aspects of Mediterranean natural habitats.
On the one hand, Krka river with its mesmerizing cascades and lavish green riverbanks. On the other Kornati archipelago with hundred islands, islets and reefs. Unlike Krka, here stone and sea are predominant elements whilst vegetation is scattered timidly in this waterless moonlike landscape.
Furthermore in high season it is wise to avoid middle of the day. Not only because of the high temperatures but also to enjoy quiet and relaxing atmosphere of Krka. So what we usually recommend is to get there early in the morning or later in the afternoon.
You can rent a bike in Skradin and cycle for half an hour to the waterfalls instead of taking the official National Park ferry. This ferry boat tends to be jammed with people. If you rent a bike, you will avoid the crowd and get a nice ride to the cascades.
Although it is mostly visited during warm part of the year, Krka has its charms throughout the year. Sometimes during colder winters you will find yourself speechless looking at its beauty covered with snow.