Plitvice Lakes National Park is perhaps the most beautiful natural wonder in Croatia. In addition to the numerous waterfalls, a bevy of wildlife can be seen, including fish, frogs and a variety of bird species. Special attractions at Plitvice include the Veliki Splat, a 100 foot waterfall surrounded by nearby boulders to which tourists have access. There is also a large waterfall complex that can be access via a cave in the surrounding rock face.