Delicately eroded rock (center foreground) at the foot of Mount Remarkable, as imaged by the Mastcam using its 100mm lens.
NASA description: This image was taken by Mastcam: Right (MAST_RIGHT) onboard NASA’s Mars rover Curiosity on Sol 601 (2014-04-15 15:00:08 UTC).
More Sol 601 images (from all cameras), and Curiosity’s latest location map.