This is the ranking of the most important sites that you should visit in Italy. The "bel paese" Italy, is an incredibly attractive country for tourism: full of medieval towns, renaissance cities, Roman ruins, fantastic landscapes, mountains, sea... plus friendly people and delicious cuisine. Although is impossible to make a complete list of all the tourist attractions, here is a list that would help you to choose a greatest travel plan.
And if you know Italy collaborate by voting/commenting/adding new places. Other tourists will appreciate any infomation and practical experience.