You have to listen closely when landing at Sobra: you hear almost nothing. A boat engine, cicadas, the lapping against the quay — Mljet is the most forested island in the Croatian Adriatic, three-quarters covered in Aleppo pines and holm oaks, and this green silence is its first luxury. Ships that stop here anchor off this small port on the north coast, from which the road winds westward, revealing a turquoise inlet between the trees at every bend.

A National Park Set on the Sea

Since 1960, the whole western part of the island has formed a national park centred on two saltwater lakes, Veliko and Malo jezero, connected to the sea by channels so narrow you can cross them in a single step on a bridge. From Sobra, the road transfer takes about forty-five minutes; most excursions include it. Smaller ships sometimes anchor directly at Polače, at the back of a sheltered cove where the walls of a 4th-century Roman palace still frame the village street. Once past the entrance, there are no more vehicles: you get around on foot, by bike or by electric boat on trails that hug the shores, beneath a pine canopy where light falls in shifting patches. Bike rentals are available at both entrances, and the full loop around the large lake is easily completed in an hour and a half of leisurely pedalling.

St. Mary's Islet and Its Monastery

In the middle of the large lake rises an islet crowned by a 12th-century Benedictine monastery, whose Romanesque church and cloister can be visited between coffees on the adjoining terrace. The boat included with the entrance ticket takes you there in about ten minutes from the small Pristanište landing. The monks left long ago, but the place retains a particular peace — people lower their voices without being asked. Walking around the islet takes about fifteen minutes, among agaves and pines leaning over the water.

Swimming in a Lake in the Middle of an Island

The small lake, shallower, warms up faster than the surrounding sea: its temperature often exceeds that of the Adriatic by several degrees. You slip in from the wooden pontoons at Mali Most, between bike rides. Swimming in warm salt water, surrounded by forest, in the middle of an island that is itself surrounded by sea: the sensation, hard to describe, alone justifies the detour to Mljet. A towel and swimsuit are all you need; the tall trees serve as changing room and parasol.

The Legend of Ulysses and the Mongooses

The island cherishes two unusual stories. The first has it that Ulysses spent seven years here, held by the nymph Calypso in a sea cave on the south coast, near Babino Polje, where boats take the curious when the sea allows. The second is more recent: in 1910, the Austrian administration imported Indian mongooses to eliminate the vipers. The snakes disappeared — and the small carnivores still trot through the undergrowth, the Adriatic's only four-legged imperial legacy.

Good to Know Before You Go

Green After Blue

In a Dalmatian itinerary punctuated by ramparts and bell towers, Mljet acts as a breather. No major monument, no lineup: trees, two lakes, a cloister and time slowing down. Many travellers admit on their return that it is this day, the simplest one, that comes back to mind first.