Next to Pelješac is the green Mljet, stretching over 100 square kilometers. Thanks to its thick pine forests, karstic caves and two picturesque lakes connected with the sea, gravelly and sandy beaches and a fishing area abundant with fish and lobster, the west part of the island has a national park status. According to many this is the most beautiful and most wooded island of the Adriatic, is one of the most interesting cultural-historical pearls of the Mediterranean, which each year is visited by many tourists.
It is popular with couples, nature lovers and researchers, lovers of the traces of historical tales and legends, the distant past, researchers and cultural-historical monuments.
Geographically, Mljet is located in the open sea on the southeast Adriatic. Its location determines clime and vegetation on the island which is famous by its natural heritage: lakes, bays, sources of drinking water, steeply and rocky coast, preserved forests of holm oak tree and aleppo pine, caves, sandy coves... Those are some of the reasons why in 1960. northwest part of the island, with its area of 3000 ha, became national park. Institution for preserving natural heritage was founded in the same year.