Asinara, home of the wild blue-eyed albino donkey (
really).  I couldn't believe the colour of the sea when I went to Sardinia, the turquoise blue was incredible.  I did one dive at Asinara with the Roccaruja Diving Centre. 
Dive #7 Location: Cala Tumbarineddu
Depth: 20metres
Time: 43minutes
 Stintino's Spiaggia Pelosa (Hairy Beach?)
 View of Asinara from Sardinia