Pisa is famous all over the world for the leaning tower. The best time to visit it is after 5pm when most of the tour busses and cruise passengers leave. To climb the tower it is necessary purchase a ticket, that is valid also for the duomo, the battistero and the cemetery and to book a time because the only let a specific amount of people in the tower at any given time.
The visit inside the Battistero is quite spectacular, the acoustic inside is amazing, for that reason it is often used for concerts.
The Duomo is absolutely breathtaking. The Pulpit made by Giovanni Pisano, is a masterpiece of stone carving.
Climbing the Tower is a great experience and offers spectacular views of the city and the surrounding hills.