Corsica Corsican honey, of which there are six official varieties, is certified as to its origin (Appellation d'origine contrôlée) by the French National Institute of Origin and Quality (Institut National des Appellations d'Origine – INAO). Corsica's main exports are granite and marble, tannic acid, cork, cheese, wine, citrus fruit, olive oil and cigarettes. Corsica has four international airports: All airports are served by regional French airline Air Corsica, as well as Air France which mainly offers connections to Paris-Orly. Budget carriers such as EasyJet and Ryanair offer seasonal connections to different cities in Europe. The island has of metre gauge railway.
Ancient Corsica the strait separating the island from Sardinia to the south was the "Fretum Gallicum". The location of the island between the Italian mainland to the east, the Gallic mainland to the north, and Sardinia to the south, made Corsica an important strategic point for control of the western Mediterranean sea. Additionally, the island was a significant hub of Mediterranean trade. Corsica was described by Theophrastus as thickly wooded and mountainous. Only the flat, coastal area was suitable for agriculture - especially the space around Aleria on the east coast - the island mainly produced timber and raw materials like copper,