Italy is located in Southern Europe and comprises the boot-shaped Italian Peninsula and a number of islands including the two largest, Sicily and Sardinia. It lies between latitudes 35° and 47° N, and longitudes 6° and 19° E.
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 Mont Blanc (4,810 m/15,782 ft). The Po, Italy's longest river (652 km/405 mi), 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: Garda (367.94 km² or 142 sq mi), Maggiore (212.51 km² or 82 sq mi, shared with 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).
The country is situated at the meeting point of the Eurasian Plate and the African Plate, leading to considerable seismic and volcanic activity. There are 14 volcanoes in Italy, four of which are active: Etna (the traditional site of Vulcan's smithy), Stromboli, Vulcano and Vesuvius. Vesuvius is the only active volcano in mainland Europe and is most famous for the destruction of Pompeii and Herculanum. Several islands and hills have been created by volcanic activity, and there is still a large active caldera, the Campi Flegrei north-west of Naples.
Although the country comprises the Italian peninsula 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.
The assumptions on the etymology of the name "Italia" are very numerous and the corpus of the solutions proposed by historians and linguists is very wide. According to one of the more common explanations, the term Italia, from Latin: Italia, was borrowed through Greek from the Oscan Víteliú, meaning "land of young cattle" (cf. Lat vitulus "calf", Umb vitlo "calf"). The bull was a symbol of the southern Italic tribes and was often depicted goring the Roman wolf as a defiant symbol of free Italy during the Social War. Greek historian Dionysius of Halicarnassus states this account together with the legend that Italy was named after Italus, mentioned also by Aristotle and Thucydides.
The name Italia originally applied only to a part of what is now Southern Italy – according to Antiochus of Syracuse, the southern portion of the Bruttium peninsula (modern Calabria: province of Reggio, and part of the provinces of Catanzaro and Vibo Valentia). But by his time Oenotria and Italy had become synonymous, and the name also applied to most of Lucania as well. The Greeks gradually came to apply the name "Italia" to a larger region, but it was during the reign of Emperor Augustus (end of the 1st century BC) that the term was expanded to cover the entire peninsula until the Alps.