Volcanic plugs of Italy

thumb|250px|Facade of the Orvieto Cathedral thumb|right|250px|The Pozzo di San Patrizio, a well built for the popes thumb|right|250px|The site of Orvieto was once an Etruscan acropolis. Orvieto () is a city and comune in the Province of Terni, southwestern Umbria, Italy, situated on the flat summit of a large butte of volcanic tuff. The city rises dramatically above the almost-vertical faces of tuff cliffs that are completed by defensive walls built of the same stone.

town in the Province of Viterbo in central Italy, a frazione of the comune of Bagnoregio

thumb|Aerial view of Stromboli and Strombolicchio from the northeast Strombolicchio () is a sea stack of volcanic origin to the northeast of the island of Stromboli in the Aeolian Islands of Italy. Its name in the Sicilian language, Struognulicchiu, means Little Stromboli. Geologically, Strombolicchio is a volcanic plug or spine of extremely hard compacted basalt resistant to erosion, and is the remnant of the original volcano from which the island of Stromboli was built up about 200,000 years ago. The small islet hosts rare flora and fauna, including endangered species, and has been declared

mountain