The historic center of Montalcino is dominated by the mighty Rocca, a fortress built in 1361 to mark the passage of the city under the dominion of Siena. The panorama that can be enjoyed from the ramparts of the fortress is truly spectacular; it goes from Monte Amiata, through the Crete up to Siena, and crosses the whole Val d'Orcia up to the Maremma hills.
Source, discovertuscany.com