Before going to Pisa, which is about 30 minutes from Florence by train , I was told you can spend 3 hours there and be content. We spent 3 hours there and were content. Besides the Leaning Tower of Pisa and the Piazza del Duomo, there is not much else to see. However, the city's history is very interesting. Pisa fought many battles, and was once a naval port, but now does not sit on the coast as it once did. The Arno River has been depositing silt for centuries, furthering the distance the city of Pisa lies from the ocean.