The island is approximately 183 km long from north to south and about 83 km wide from west to east. the 10 most beautiful beaches in pdf corsica. corsica is the fourth largest island ( after sicily, sardinia,. corsica, collectivité territoriale ( territorial collectivity) of france and island in the mediterranean sea embracing ( from 1976) the départements of haute- corse and corse- du- sud. corsica is the mediterranean sea’ s fourth- mappa spiagge corsica pdf largest island after cyprus, sardinia, and sicily. here' s our pick of the best beaches spiagge on the isle of beauty. from hidden coves to urban beaches packed with amenities, corsica has a sandy paradise awaiting you. its mappa coastline is about 1, 000 km, and it covers an estimated 8, 722 km 2 or under 2% of france' s total land area.