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Mountainous terrain in central Xanadu, Titan The central part of Xanadu contains a lot of topographic relief. This RADAR image is illuminated from the top; it reveals many spiky north-facing slopes. The peaky terrain is cut by a few apparently smoother valleys or plateaus. Some vertical striping in this image is an instrument artifact. This image covers an area about 260 kilometers wide by 170 kilometers high (160 by 100 miles). NASA / JPL-Caltech