If you do this, you may want to check your bags, except what you need for the beach and to wear back, at Pisa Centrale (I believe there is a baggage check there). Then enjoy the beach. Viareggio is a bit commercial (there is a street with shops, restaurants, bars, cafes and a number of nice beach clubs so there's lots to do). In spite of it being developed, it's a very nice beach with wonderful views of the mountains and sea...


Viareggio last October - expect it to be more crowded in the summer but it is a BIG beach.