This image was taken by NASA’s Mars Reconnaissance Orbiter (MRO) Context Camera (CTX) on 2014-06-05T11:31:21.229.
NASA describes this image as “Noachis Terra.”
Case #20: Geometric pattern on Martian surface and disc-like craft inside Martian crater:
This is my first discovery of what looks like an unnatural pattern on the Martian surface. The pattern is geometric and consists of straight, parallel lines and equal angles. I estimate the longest line to be 3 km in length. I have highlighted the pattern with white lines.

Also, there is what looks like another disc-like craft inside a crater. This too looks unnatural, notice the perfect edge. I estimate the diameter of the disc to be 100 metres across.

Original NASA source: http://viewer.mars.asu.edu/planetview/inst/ctx/F03_036832_1252_XN_54S355W
I used NASA’s image viewer to the left of the NASA web page to view these anomalies.
I can only speculate whether this is an artificial geometric pattern and as always whether this disc-like object is another craft inside a crater.
Subscribe to my YouTube channel and turn on notifications to be notified when new videos are uploaded.
Also visit Twitter page @RaptorZN_.