Villas In Italy

I'm looking forward to have a nice holiday to Italy, recently I am searching the info of Villas in Italy on internet. I never have been there before, so kind of curios how much will it cost to rent a villa. I know booking villas online shouldn't be difficult, since there so many website offers cheap rental. But the problem is I don't know I should rent the Villas at which part of Italy. My geography is darn terrible. :P ..Ok..Wish to gather more info about on Italy interesting place, so that I could make a decision where to stay..haha