Mljet National Park

The western third of the island of Mljet is protected as a national park and encompasses two interconnected saltwater lakes — Veliko Jezero and Malo Jezero — set within dense Aleppo pine forest. A small Benedictine monastery occupies an islet in the larger lake, accessible by boat from the shore. The lakes are warm, calm, and suitable for swimming, while the surrounding forest is habitat for a semi-wild mongoose population introduced in the late nineteenth century.