The Leaning Tower of Pisa is renown worldwide for its almost four-degree tilt, the result of being built with an unstable foundation.
This is perfect stop on your Italian vacation, with lots of great shops and restaurants (I had the best pizza of my life in a restaurant with a view of the tower!).
The green space surrounding the tower is a great place to relax, take a few photos and people watch.
Make sure to also wander the town of Pisa itself, which is charming and filled with friendly locals.