Volterra and San Gimignano are pretty much the main attractions themselves, you go and visit them and if you're interested, visit a few of the churches and monuments at each such as the cathedral, climb to the top of a tower in San Gimignano, visit the archeological dig in Volterra. The area of San Gimignano produces an interesting white wine called Vernaccia, if you ask at the tourism office in San Gimignano they can tell you which wineries nearby are open for tours and tastings on the specific day. The same goes for anywhere else you go, the small tourism offices are pretty well informed.
You might say Montalcino and Montepulciano have "more" to offer since they are smaller and there are additional towns in between. Also both towns produce red wines - the Brunello di Montalcino and the Rosso di Montepulciano. If you're a wine enthusiast, you'll find more on offer in the are as concerns wines so in this case I'd recommend you head here!
Hope the trip to Tuscany goes well and that you'll find your visit loads of fun! Do let us know afterward about all you end up doing and your own recommendations and "finds"
You might say Montalcino and Montepulciano have "more" to offer since they are smaller and there are additional towns in between. Also both towns produce red wines - the Brunello di Montalcino and the Rosso di Montepulciano. If you're a wine enthusiast, you'll find more on offer in the are as concerns wines so in this case I'd recommend you head here!
Hope the trip to Tuscany goes well and that you'll find your visit loads of fun! Do let us know afterward about all you end up doing and your own recommendations and "finds"