Erean Mountains
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The Erean Mountains (also called the Heraean Mountains) (Sicilian: Munti Erei; Italian: Monti Erei; Latin: Heraei montes) are a mountain chain in central Sicily, southern Italy, mostly located in the central and northern areas of the province of Enna. The highest peak is the Monte Altesina, at 1,192 m above sea level.
For EREI, see Energy returned on energy invested