From A1 ,exit Val di Chiana, at the crossroads follow signs to Torrita di Siena(it’s on the left).
After about 7 Km you find Torrita di Siena, follow signs  to Pienza-Montefollonico for 3,5 Km, on the left there is a sign “San Teodoro 200 mt”, turn right, go straight on in a country road for 1,7 Km than follow the asphalt road on the right, after 200 mt turn right(country road), after 500 mt you find an old house, go straight on for 700 mt  to get Agriturismo San Teodoro.