Erean Mountains

The Heraean Mountains are of limestone origin, and do not reach high altitudes.

Their area was once one of the most important in the world for the production of sulphur, as testified today by numerous mineral quarries, the largest being that of Floristella-Grottacalda.

The chain is home to the largest Italian city above 900 m altitude (and the largest provincial capital in Europe at that altitude as well), Enna, which is home more or less to one-sixth of the whole Herean population.

The mountain chain is crossed by a motorway, A19 Palermo-Catania, and by a railroad running in the same direction.

Most of the remaining roads wind and curve extensively through the terrain due to its rugged and geologically unstable nature.