This very popular shot must have enticed so many people to take a visit to the Italian Riviera.
The diagonal composition is great in this picture, it guides your eye from one corner to the other. It combines three great elements, air, land, and sea.
A JPeg file, loaded with color, is a panoramic view, so most of the grounds are in focus. It must have been taken with fast shutter speed. What makes this image so special I think is the burst of color in the middle without being so overwhelming, since there is green and blue at opposite sides, which creates resting support to the eyes.