Mount Etna

Etna is one of the most active volcanoes in the world and is in an almost constant state of activity.

An excerpt from the article 21 facts about Mount Etna

Because of the volcano's history, its highly destructive eruptions, and its proximity to densely populated areas, the International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI) has included Etna in the Decade of Volcanoes (16 volcanoes are included).

The Decade of Volcanoes is a project initiated in the 1990s as part of the International Decade for Disaster Reduction sponsored by UN.