Three volcanoes constantly keep Italy on tenterhooks: Stromboli, the most active; the unpredictable Vesuvius; and the tallest, Mount Etna. At a height of 3352 meters, it visibly dominates much of the eastern coast of Sicily. Time and again, earthquakes shake the region, clouds of ash darken the skies and lava flows destroy houses high up on the mountain. A team of volcanologists and rangers on site monitor every movement Etna makes. Theoretically, an eruption could happen at any time.