To the southeast of Chianciano, 10 km (6 mi) along SP19, lies this relatively unspoiled village that dates from the 12th and 13th centuries. The town's narrow streets, which wind slowly up toward an imposing fortress, now privately owned, make for very pleasant strolling.
San Martino in Foro. Don't miss this small church, which houses a striking Annunciation by the important Sienese painter Domenico Beccafumi (1486–1551). Piazza San Martino, Sarteano, 53042. No phone. Daily 9–12:30 and 4–7:30.
- Address: Chianciano Terme
- Location: Chianciano Terme