Laguna del Mort is located in the northeast of the Venetian Lagoon, in the resort town of Lido di Jesolo. Until October 5, 1935, what is today called Laguna del Mort was the last stretch of the Piave River before its confluence with the Adriatic Sea. And on that day, as a result of an unusually high rise in the water level, the river overflowed its banks and changed its direction of flow, rushing to the sea. Its new mouth turned out to be located 3 km south of the former one, and access to the old channel was blocked by tons of mud and silt. The last section of the Piave river was thus deprived of constant access to fresh water and was filled only during high tides. This is how Laguna del Mort was born.

Today, this lagoon, spread over an area of ​​over 125 hectares, is the natural habitat for numerous species of seabirds. It consists of sand dunes, and its shores are overgrown with maritime pines, which have formed an ecosystem characteristic of coastal flora and fauna.
The main aquatic plant species of Laguna del Mort are seagrass and various algae. To the southeast are reed marshes, and the former Piave riverbed is home to evergreen shrubs with stiff leaves and small blue or white flowers. The coastal dunes are highlighted by a man-made forest of maritime pines, junipers, European Sverbige and sand reeds at the water's edge.

As for the wild inhabitants of Laguna del Mort, there are hares, weasels, European green toads, green lizards, copperheads, snakes, mallards, teals, whistles and red-headed dives. In addition, nightingale warblers, sea plovers and striped fan-tailed warblers nest in the lagoon. Sometimes you can see honey buzzards and red herons.

In 2011, Laguna del Mort was named one of the 11 most beautiful beaches in Italy by the Italian League for the Conservation of Nature.