Morphology

Discover our island

 

 

 

The isle of Giglio is the second largest island in the Tuscan Archipelago. Situated in the Tyrrhenian Sea, it is about 11 miles west of Mount Argentario. The island is granitic and its ellipsoidal shape is very similar to the isle of Capraia. The morphologic elements of the island are mountainous with the presence of beaches within bays and a diversification in structure between the west and east coast.

The highest relief, 496 meters, is Poggio della Pagana, which provides breathtaking vistas of the incredible landscape of the Tuscan Archipelago. There are some flat areas as well, now significantly cultivated with vineyards: Fontuccia, Pentovaldo, Mortoleto and many others.
As a result of the steep relief, deep incisions have been formed by millennia of runoff water from the winter rains, carving out paths to the sea, descending to the floodplains of granitic rocks smoothed by erosion over thousands of years.
There are also many natural and manmade cisterns and basins, covered or open, used to collect rainwater in the vicinity of cultivated fields, vineyards and shelters for livestock.
Natural springs, some of them of considerable scope, are also used for the water supply of the island’s towns. Desalinization plants provide the rest of the water supply and are the exclusive source of water for Giannutri.
Rain is scarce, reaching a peak in the winter months and with a mean value of about 336 mm per year. The almost constant wind is typical of Giglio’s island climate.
The original evergreen oak forests were cut down centuries ago to make way for cultivated terraces. Viticulture has always been one of the main agricultural activities on the island. The maritime pine forests are now dense and numerous, but the habitat they provide is inferior to that of the old oak forests.

Geographically, Isola del Giglio is part of the province of Grosseto in the region of Tuscany.