Mljet was originally one of the Roman possessions (indeed, Polače means "palace" and holds some Roman ruins). Over the course of history, the isle traded hands with the rest of the Balkans (to the Ottomans, the Austro-Hungarians, etc.) It was even promised to Italy at one point in the early 20th century. Once the Kingdom of the Serbs, Croats, and Slovenes was declared, the Island became part of that group.
Ancient Greeks called the island "Melita", or "honey," which over the centuries evolved to become the Slavic name, Mljet.
Over 72% of the island of 388 square miles is forest. The island's geological structure consists of limestone and dolomite forming ridges, crests and slopes. A few depressions on the island of Mljet are below sea level and are known as blatine ("mud-lakes") or slatine ("salt-lakes"). During the rain seasons all blatine are filled with water, and they turn to brackish during dry seasons.
The climate is Mediterranean; an average air temperature in January is 48°F (9°C) and in July about 75°F (24°C).
National Park entrance fee
There is an entrance fee of 125kn per person to enter the Mljet National Park. If you are joining an excursion organised by a travel agency to Mljet, it may not include this entrance fee, so make sure you check before booking.
On summer days speed boat goes from the port of Sobra to Dubrovnik every day at 6:15AM (Tuesday and Thursday at 6:00) and at 17:35. From port of Polače speed boat goes every day at 4:55PM From Sobra car ferry goes every day to Prapratno (peninsula Pelješac) at 6:00, 9AM and at 12:00, 16:00, 19PM (on Sunday and holiday goes at 10AMn not at 9:00).
With speed boat you can also go to island Korčula from Polače and Sobra on Monday, Tuesday, Thursday and Saturday, and with car ferry from Sobra on Monday, Wednesday and Saturday. There is speed boat from Sobra and Polače to island Lastovo on Tuesday and Thursday.
To Split you can go from Sobra with car ferry on Saturday.