Italy is located in Southern Europe, between latitudes 35° and 47° N, and longitudes 6° and 19° E. To the north, Italy borders France, Switzerland, Austria, and Slovenia and is roughly delimited by the Alpine watershed, enclosing the Po Valley and the Venetian Plain. To the south, it consists of the entirety of the Italian Peninsula and the two Mediterranean islands of Sicily and Sardinia (the two biggest islands of the Mediterranean), in addition to many smaller islands. The sovereign states of San Marino and the Vatican City are enclaves within Italy, while Campione d'Italia is an Italian exclave in Switzerland.
The country's total area is 301,230 square kilometres (116,306 sq mi), of which 294,020 km2 (113,522 sq mi) is land and 7,210 km2 (2,784 sq mi) is water. Including the islands, Italy has a coastline and border of 7,600 kilometres (4,722 miles) on the Adriatic, Ionian, Tyrrhenian seas (740 km (460 mi)), and borders shared with France (488 km (303 mi)), Austria (430 km (267 mi)), Slovenia (232 km (144 mi)) and Switzerland (740 km (460 mi)). San Marino (39 km (24 mi)) and Vatican City (3.2 km (2.0 mi)), both enclaves, account for the remainder.
The Apennine Mountains form the peninsula's backbone, and the Alps form most of its northern boundary, where Italy's highest point is located on Monte Bianco (4,810 m or 15,780 ft). The Po, Italy's longest river (652 kilometres or 405 miles), flows from the Alps on the western border with France and crosses the Padan plain on its way to the Adriatic Sea. The five largest lakes are, in order of diminishing size:[124] Garda (367.94 km2 or 142 sq mi), Maggiore (212.51 km2 or 82 sq mi, whose minor northern part is Switzerland), Como (145.9 km2 or 56 sq mi), Trasimeno (124.29 km2 or 48 sq mi) and Bolsena (113.55 km2 or 44 sq mi).
Although the country includes the Italian peninsula, adjacent islands, and most of the southern Alpine basin, some of Italy's territory extends beyond the Alpine basin and some islands are located outside the Eurasian continental shelf. These territories are the comuni of: Livigno, Sexten, Innichen, Toblach (in part), Chiusaforte, Tarvisio, Graun im Vinschgau (in part), which are all part of the Danube's drainage basin, while the Val di Lei constitutes part of the Rhine's basin and the islands of Lampedusa and Lampione are on the African continental shelf. Monte Cimone (2165m) is the highest mountain of the northern Apennines in the Emilia Romagna Dolomites in the Italian Alps, a UNESCO World Heritage Site.