Curiosity Right Mastcam (M-100)

Sol 51 16:22 Site 4/2956 0051MR0465000000E1_DXXX
Surface Sampling System assessment of tunnel top [observations]
Sep 27, 2012 at 4:18:49 PM UTC (approximate)
Credit: NASA / JPL-Caltech / Malin Space Science Systems

Image Source