Trekking in Corsica
Five days along the Sentier de grande randonnée 20 (GR20), among imposing mountains, ridges, woods, waterfalls, natural pools, refuges and ponds in the wild heart of Corsica, between Vizzavona and Lac de Melo
more details on the page in Italian:
https://www.fabioghisu.com/ita/articolo/trekking-in-corsica#1