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The S.Giovanni cave is 850m long and until a few years ago it was the only one in Italy (and one of the few in the world) to be traveled by car. Now the cave is closed to traffic and can be walked afoot.
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Sardinia is the second-largest island in the Mediterranean Sea (after Sicily). The area of Sardinia is 24,090 square kilometres (9,301 sq mi). The island is surrounded (clockwise from north) by the French island of Corsica, the Italian Peninsula, Tunisia and the Balearic Islands. Sardinia is a constitutional part of Italy, with a special statute of regional autonomy under the Italian Constitution. http://en.wikipedia.org/wiki/Sardinia
