I'm half Corsican from my mother. From my birth to my 17 I've been spending my summers in Corsica. My family is based in the north bt I've visited almost the whole isle. Once we went to visit Bonifacio, at the extreme south. After wandering in the city, we took a small boat to go the the Lavezzi Islands, an archipelago situated at five kilometers from Bonifacio.
Corsica also called "The beauty Island" is in the Mediterranean Sea. This island contains the "GR20":http://en.wikipedia.org/wiki/GR20 , one of Europe's most famous and difficult hiking trails. There is many beautiful mountains with a lot of rivers like the Tavignano, the Restonica with very cold water but after a hard hiking it's a pleasure to swim in a pure water.