Considering the Villa Liberty in Siena?
A VT member wrote the following comment about visiting Siena:
Orange Tra-IN busses around Siena by alysania
These busses are GREAT! They go all over the city and a schedule is posted at every stop. While there is no car or bus activity permitted inside the city (it's small enough, use your feet!), if you have a hotel outside the city walls, this is the greatest mode of transportation. It was 77 cents in euros while i was there for one trip, which you could buy at any tabacchi shop.