Etna, Mount, an active volcano on northeastern Sicily. It is among the world's largest active volcanoes and is the highest in Europe. Built up by successive lava flows, the main cone reaches 10,902 feet (3,323 m) in elevation. Major eruptions and lava flows, however, often result in large changes in height. Deep fissures as well as hundreds of minor vents mark the slopes.

The volcano is snow-capped for most of the year. The lower slopes are extremely fertile and are used for growing citrus fruits, olives, figs, grapes, and other crops.