Pisa is a city in the region of Tuscany, in central Italy. It is located on the banks of the Arno River, and has a population of about 90,000 people. Pisa is known for its rich history and cultural heritage, and is home to many famous works of art and architecture. The city is most famous for the Leaning Tower of Pisa, a bell tower that is famous for its lean. The tower is part of a complex of buildings that includes the Pisa Cathedral and the Baptistery, both of which are UNESCO World Heritage Sites. Pisa is also a popular destination for students, as it is home to the University of Pisa, which is one of the oldest universities in Europe.