You are in Tuscany, we highly recommend doing a wine tasting while you are there.
Spend a day exploring the capital of artists
Its a gorgeous medieval town with UNESCO listed historic center.
We highly recommend doing a cooking class while you are there. Its some of our best memories doing these classes together while in Italy.
See Siena by air in a hot air balloon.
Eat your way through the city streets via one of the organized walking food tours