Laguna di OrbetelloLaguna di Orbetello is a lake in the Province of Grosseto, Tuscany, Italy. At an elevation of 1 m, its surface area is 26.9 km2.OverviewIt is separated from the Tyrrhenian Sea by two tombolos that join the promontory of Monte Argentario to continental territory. In the middle of the lagoon, on another land strip, is located the town of Orbetello.