easy day trips from Siena
 

any advice on day trips that can be done from Siena via train or bus in the Chianti southern Tuscany area? In early October.

Florence?

In 3 directions, I would plan to see Montalcino, Castellina, and San Gimignano--all by bus. See www.turismoverde.com for more details.

Thanks Bob, have visited Castellina, stayed in Montalcino and San Gim before - what about Radda or Montepulciano?

I don't know if you can get there by bus, but I would highly recommend the walled town of Montepulciano for a day trip.

Direct busses are available from Siena to Montepulciano. In fact they are as quick as driving, and a whole lot cheaper (round trip for two people just over 17 euro).