Krka National Park... Along with its richness of Mediterranean and sub-Mediterranean flora and fauna, there are two endemic species of trout living in the Krka: the Visovac trout and the Adriatic salmon. A special charm is given to the Park by the numerous historical and cultural buildings which provide evidence of human settlement in the region from ancient times on (there are pre-historic remains in the caves, the remains of Roman buildings and a villa rustica, an Early Christian basilica, the ruins of a medieval fortress and numerous mills which are still in use today). Of all of these, the most precious jewels are the Franciscan monastery on the island of Visovac and the Krka Monastery, with their rich treasuries of culture and art. There are several picturesque settlements in the Park, the most interesting being the little town of Skradin, which is protected as a national cultural monument.