Catania is the second-largest municipality on 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 of 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.