Orbetello soon appears in an evocative and charming setting, in the middle of a lagoon, surrounded by water and connected to the cape Argentario by a thin earth strip, the "diga", constructed in years 1841/1842. The only natural connections from the mainland to the cape are the Tombolo della Feniglia and the Tombolo della Giannella, characterized by long sandy beaches, pine woods and Mediterranean bushes. The environment of this place is so peculiar that, in order to save it, have been instituted the Parco naturale della Maremma, the WWF Park of the Lagoon of Orbetello and the Riserva forestale della Feniglia. The historical center of Orbetello is encircled by Etruscan walls, built with big blocks, they probably go back to the 5th century b.C.
Noteworthy is also the ancient Cathedral of Santa Maria Assunta, that was built on a Etruscan-Roman temple and was embellished in 1315; inside several works of art are conserved among which some frescoes of the 15th century and works of baroque age. From the artificial bridge on the lagoon that connects the town to Argentario, you can see the Spanish mill: built in the 1500's, it used the power of water to grind the grain, that was carried to the mill through the 'barchini', typical boats used in the lagoon, that still today are used every year, last Sunday of July, for the traditional race of the barchini, whose first edition dates back to 1768. The 5 quarter of the town challenge each other in this oar competition.