Pisa is one of those places you just go there to see that main touristic building and then you move on. In 2009, on my high school trip we visited Pisa. We were probably there for a total of 3 hours. It was a stop on our way to another city and it was more time than needed.
As soon as we got there we had to push our way among a huge crowd of tourists. You cross a gate and to the left hand side is the church to which the bell tower (Leaning Tower of Pisa) belongs to. On the right hand side of the walkway are a whole bunch of vendors selling you everything and anything.
It is quite a large bell tower. Surprising that it is still standing as part of it has sunk significantly. Being in our teens did the tourist stuff… take pictures pretending to stop the tower from falling. Back then there wasn’t a fence preventing you from going on the grass just a guard that would walk up and down telling people to get off; it was the perfect place to nail the picture.
Now there is a fence all around it, so unless you are an amazing photographer or great at photoshop I don’t think you can execute it as well.
I didn’t walk all the way up to the tower, I was too worried about loosing people in the large crowd and missing the bus back. But if you have time to spear you can get close to the bell tower and see its details as well as walk around the cathedral grown. You are also permitted to go into the church as well.
Most recently they have begun to permit people to actually climb the bell tower. Before they were afraid it would cause it to sink further. They only allow a certain number of people up at a time as a precaution. My advice would be to buy your ticket before hand.
If you don’t have time or want to climb up just going to see it and taking the iconic photo is very satisfying. You can even indulge in a gelato.