Corsica is an island in the Mediterranean Sea and one of the 18 regions of France. It is the fourth-largest island in the Mediterranean and lies southeast of the French mainland, west of the Italian Peninsula and immediately north of the Italian island of Sardinia, which is the land mass nearest to it. A single chain of mountains makes up two-thirds of the island. It is also the fourth-largest island in the Mediterranean, after Sicily, Sardinia and Cyprus.
The island is 183 km (114 mi) long at longest, 83 km (52 mi) wide at widest, has 1,000 km (620 mi) of coastline, with more than 200 beaches such as Paraguano. Corsica is very mountainous, with Monte Cinto as the highest peak at 2,706 m (8,878 ft), and around 120 other summits of more than 2,000 m (6,600 ft). Mountains comprise two-thirds of the island, forming a single chain. Forests make up 20% of the island.