Together with the Apennines to the south-west and the Alps to the north-west, this range defines the rim of the Mare Imbrium. Although it is a smaller and less spectacular range than the Apennines, its highest point is taller by some 1000m at 6000m. An observer stood here could see both the Mare Imbrium and the Mare Serenitatis.
Photo: Patrice Poyet. The full size original of this can be seen in his large annotated collection of images, Poyet's Celestial HyperBook.