Mount Etna, or simply Etna, is an active stratovolcano on the east coast of Sicily, Italy, in the Metropolitan City of Catania, between the cities of Messina and Catania. It is located above the convergent plate margin between the African Plate and the Eurasian Plate. It is one of the tallest active volcanoes in Europe, and the tallest peak in Italy south of the Alps with a current height of 3,357 m (11,014 ft), though this varies with summit eruptions. Over a six-month period in 2021, Etna erupted so much volcanic material that its height increased by approximately 100 ft (30 m), and the southeastern crater is now the tallest part of the volcano.

Catania is the second-largest municipality in Sicily, after Palermo, both by area and by population. Despite its reputation as the second city of the island, Catania is the largest Sicilian conurbation, and among the largest in Italy. It has important road and rail transport infrastructures, and hosts the main airport in Sicily. The city is located on Sicily's east coast, facing the Ionian Sea at the base of the active volcano Mount Etna. It is the capital of the 58-municipality region known as the Metropolitan City of Catania, which is the seventh-largest metropolitan area in Italy. The population of the city proper is 311,584, while the population of the Metropolitan City of Catania is 1,107,702.