Lava flow

Etna is one of the world’s most active volcanoes, and is almost constantly in a state of activity. The first recorded observation of its eruption was made by Greek historian Diodorus Siculus in 425 BC. or centuries Etna has been threatening the heavily populated towns and villages surrounding the foothills of mountain, despite the volcano’s character. Due to this character and own persistency, the coastal town of Catania had to be rebuilt on several occasions after being hit by lava between 122 BC and 1185 AD. The 3,329-meter-tall volcano, which has four summit craters, has been added to the list of UNESCO World Heritage Sites in June 2013.