Corsica is a French island in the Mediterranean Sea. It is located west of Italy, southeast of the French mainland, and north of the Italian island of Sardinia.
Corsica was formed as an island through volcanic explosions. It is known as the most mountainous island in the Mediterranean. Corsica is 183 kilometres long at longest, 83 kilometres wide at widest, has 1,000 kilometres of coastline, more than 200 beaches, and is very mountainous, with Monte Cinto as the highest peak at 2,706 metres and 20 other summits of more than 2,000 metres. Mountains comprise two-thirds of the island, forming a single chain. Forest comprises 20% of the island.
Approximately 3,500 km2 of the total surface area of 8,680 km2 is dedicated to nature reserves (Parc Naturel Régional de Corse), mainly in the interior. Corsica contains the GR20, one of Europe's most notable hiking trails.
The island is 90 kilometres from Tuscany in Italy and 170 kilometres from the Côte d'Azur in France. It is separated from Sardinia to the south by the Strait of Bonifacio, a minimum of 11 kilometres wide.
Source: en.wikipedia.org/wiki/Corsica - 13.03.2012
About two third of the coast of Corsica are rocky.