Begin by meeting your local guide at the La Spezia Cruise Terminal. Jump on your air-conditioned bus, then set off. Listen as your guide provides a fun and interesting introduction to your tour. Then sit back, relax, and enjoy the views of the Tuscan countryside passing by your window for around 2:30 hours ride.
(possibility of tram transfer with paid ticket depending on traffic in Florence)
Once in Florence, hop off the bus and enjoy some free time in the city centre. Pay a visit to the Piazza della Signoria, the Santa Maria del Fiore Cathedral, and, of course, Michelangelo's David. Purchase a traditional Italian ice cream on the way. After that, get back on the bus and head to Pisa.
Disembark in Pisa. Wonder around Miracle Square, and marvel at the 3 structures found there: the Baptistery, the Cathedral of Santa Maria Assunta, and the Camposanto. Then visit the Leaning Tower of Pisa, and take photos in front of it. Finally, make your way back to La Spezia on the bus.