Yes, the Leaning Tower of Pisa, one of the most recognisable landmarks in the world, is free to visit. It is in the Piazza dei Miracoli, alongside two other buildings well worth your time and attention. The tower is actually a bell tower, and whilst it is the most famous of the three buildings, it is only a small part of a historic location. Pisa Cathedral and Baptistry are also on-site, and visiting the outside buildings is free, so you can grab that picture of you holding up the tower for no cost. You can even access the site in the evening during the summer months, with the tower open until 10 pm throughout June, July and August, perfect for a romantic walk before you dine out on the banks of the Arno. There is an entry fee if you wish to go up the tower. It is a popular destination, so if you want to avoid disappointment, it is advisable to book in advance. Be aware that for the safety of your little ones, they're only allowed up the tower once they're eight years old.