Whether somewhere is a 'good stop' depends entirely on one's personal interests. Pienza is a UNESCO World Heritage Site in the Val d'Orcia region, a UNESCO World Cultural Landscape. Although the village (originally named Corsignano) dates back to at least the 800s AD it was rebuilt in the early 1400s, renamed Pienza and is regarded as an important example of historical town planning. Its sights include the Pienza Cathedral, the Palazzo Piccolomini, the Palazzo Vescovile and the Palazzo Comunale: the four buildings form the sides of the central piazza (square). There are also other ancient churches and palazzi. Whether you're interested in visiting is your choice.