The Mort Lagoon, an extremely evocative naturalistic site between Eraclea and Jesolo, was originated by the overflowing of the Piave river in 1936, whose bed was modified in its last stretch after a big flood. The Mort stretches between Eraclea Mare and the mouth of the Piave river and it is a sea-lagoon, being supplied with water only by the flood-tides. Still uncontaminated, the Mort is characterized by shallow and calm waters with a sandy and muddy seabed, rich in phytoplankton.