I visited this WHS in August 2013. Without Pienza there wouldn't have been Florence as we know it! It is the first Renaissance town and was used as a model for other towns and cities in Tuscany and Italy. The views over Val d'Orcia are worth taking in at sunset with a glass of wine. Via delle Case Nuove is interesting too and there is a very good organic gelateria named Buon Gusto which is the best in town!