The Aeolian Islands in the Tyrrhenian Sea, to the northeast of mainland Sicily form a volcanic complex, and include Stromboli.
The three volcanoes of Vulcano, Vulcanello and Lipari are also currently active, although the latter is usually dormant.
Along the northern coast, the mountain ranges of Madonie, 2,000 m (6,600 ft), Nebrodi, 1,800 m (5,900 ft), and Peloritani, 1,300 m (4,300 ft), are an extension of the mainland Apennines.
The cone of Mount Etna dominates the eastern coast.
Etna covers an area of 1,190 km (459 sq mi) with a basal circumference of 140 km (87 mi).