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Avernus Colles is a region of fractured terrain on Mars on the southeast margin of Elysium Planitia, at 1.6°S, 171°E. It is fairly large, being 244 km (152 mi) in diameter. Avernus Colles can be found in the Elysium quadrangle. It was named in 1985 after a lake in Campania, Italy, which is believed by some to be an entrance to the underworld.
References
Avernus Colles Wikipedia(Text) CC BY-SA