Mljet, a woodland-covered island in the southern Dalmatian island group, along with Korcula and Lastovo, comprises the furthermost islands of the Dubrovnik archipelago. It is 36 km long, with an area of around 100 km2. The indentation of the coastline is especially evident in the western part of the island. In addition to many natural attributes that mark the Croatian coastal area, it possesses several specific characteristics, e.g. the unique lakes of Mljet. Besides natural treasures, it is the site of several valuable cultural monuments. Thus, Mljet is a locality of exceptional natural rarity, wondrous beauty and cultural-historical, scientific and
aesthetic value.The lakes of Mljet are a unique natural phenomenon. The sea enters them through a narrow passage creating two beautiful salt-water lakes connected to the open sea by the long Soline bay. The western part of the island surrounding the lakes, some 3,100 hectares in area, has been proclaimed a national park in 1960. It is intended not only for scientific exploration, but also specific forms of tourism and recreation. Tours of the lakes, the islet with a monastery that is presently adapted as a hotel and other localities, are conducted by boat, and asphalt paved roads lead around the island to the Soline bay and the open sea.
Simple footpaths lead to the most picturesque and remote parts of the park. The Island of Mljet has no airport. Dubrovnik airport on the mainland provides the main international connection for the island. Mljet has ferry lines with Pelješac peninsula and Dubrovnik. Transportation to the island is provided by Jadrolinija ferry service. Sobra, the main port on the island, is connected to Dubrovnik-Gruž and Ston via a car ferry. There is also a ferry between Polače and Trstenik (Pelješac peninsula).