I would say, it very tough to decide which place to viist in Italy as everything is so beautiful there, but if you are a history person u can go to Rome its beautiful and a must visit, while I think Florence's Renaissance masterpieces are also killer. Apart from that, you can consider Venice's...
You can explore beaches like Vanderbilt Beach and Delnor-Wiggins Pass State Park
check out the Naples Botanical Garden's themed tropical landscapes.
Do d water activities like kayaking through mangrove tunnels.
If like u can go for dolphin-watching cruise in the Gulf waters