Vietti is a name that you may recognize from Italian wine lists at upscale restaurants around the world. This winery is located under the city of Castiglione Falletto in Piemonte, and crafts single-vineyard wines from all over Piemonte. As you drive through the windy roads of the town of Castiglion Falletto, you'll find a large gate. Just behind that is a beautiful modern tasting room along with a historic cellar that winds down under the city walls and its famous castle.