Best tourist spot in italy?

I haven't been on Italy but I sure do want to visit the Colosseum because It is always featured on TV shows and travel magazines. I will definitely go there when I start earning enough money after graduating college.

I've always wanted to go to Italy, really hope I can do it some time. If only I had enough money, I would have visited it and made my dream come true. My first impression about Italy is Venice, read about it in a comic when I was in primary. I wondered why would a city covered by so much water and how they build the houses, the transportation (Gondola, right? :), how the people seeing their neighbours, etc. I think the scenery is stunning and so perfect for wedding photography, Lol.

I havent been to Italy but it seems like there would be alot of places to choose from like the leaning tower. I think the sistine chapel would also be a wonderful place to visit and one that I would be very interested in seeing. There is also the Trebe fontain which would be a really nice place to visit.