Catania is located on the east coast of the island, at the foot of the active volcano Mount Etna. The position of Catania at the foot of Mount Etna was the source, as Strabo remarks, both of benefits and evils to the city. For on the one hand, the violent outbursts of the volcano from time to time desolated great parts of its territory; on the other, the volcanic ashes produced a soil of great fertility, adapted especially for the growth of vines.
Under the city run the river Amenano, visible in just one point, south of Piazza Duomo and the river Longane or Lognina.