Monte Argentario is a comune (municipality) and a peninsula belonging to the Province of Grosseto in the Italian region Tuscany, located about 150 km south of Florence and about 35 km south of Grosseto. The peninsula is connected with the mainland by three dams which form two lagoons, the Laguna di Ponente on the west side and the Laguna di Levante on the east side of the middle dam.
• Fortezza Spagnola (Spanish Fortress), in Porto Santo Stefano • Forte Filippo and Forte Stella, in Porto Ercole • The church of St. Erasmus, in the historical centre of Porto Ercole, not far from the Porta Pisana • The Via panoramica (Panoramic Road), running alongside the coast.