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Pisa is a city in Tuscany. Located in central Italy, on the right bank of the mouth of the Arno River on the Ligurian Sea.
It is the capital city of the Province of Pisa.

Pisa is a small city, but she is famous because of the Leaning Tower. The Leaning Tower is on the Piazza dei Miracoli square.

The Piazza dei Miracoli square is a very beautiful square, maybe the most beautiful square in the world.

To see absolutly:
The Baptistry of the Cathedral
Leaning Tower of Pisa
The walls of the city
The Duomo (Medieval Cathedral)
Santa Maria della Spina church just near the Arno River
Palazzo della Carovana or dei Cavalieri

It is very easy to visits Pisa. At the railway station, you can go by foot to the Piazza dei Miracoli square (15 minutes) and see the
Santa Maria della Spina church and the Piazza dei Cavalieri square on the way, or take the bus just near the railway station.

You can go to Pisa for the day since Florence city.