Looking at the newest images from the lander Perseverance.
The image to start this off is a petrified sandworm of Dune fame. There are many of these evident on all the lander sites. Usually they have an open mouthed appearance. I just find them interesting in the way the rocks split in the same spot facing up to the sky.
Second observation of the Perseverance images. There are two objects of interest marked A and B. A is a fluted boulder. Very unusual in that the flute faces forward to the camera and the surfaces on either side of the flute appear to be rounded and polished.
B has a box etched into the surface facing upward.
This doesn't need any enhancement. I placed a black arrow pointing at a rock that is a small pyramid that is tilted up in the air seemingly sitting on one corner. Now I understand we can't see all sides of it, but we do get a sense of its total shape from the top, which we can see.
Next observation is a sitting pillow turned on its edge. The insert shows what a sitting pillow looks like next to the object.
NASA showed this image as an example of wind erosion. Note how the rock is scooped out leaving the arms, one up in the air and one down in the sand. Now look at the rock below being pointed at with the black arrow, top left of the image. IT is also scooped out. However, it is lying flat and the scoop in top to bottom, making it impossible for the wind to have caused this feature.
Regarding the machine head, there are dozens of these all over the landscape. The rounded fan and spoke pattern is constant. There are numerous other impressions of things that look like cables seared into the very fabric of the rock. I'll pop one of those in here later.
To the left (half way across to the left) there is this curious rock I call the School Ring. It looks like it has a rounded top and faceted sides with carvings. Almost can see a little horse on the right side.
There are scooped out rocks all over this site. NASA has already shown one (the pillow above) claiming the wind eroded it. They have an argument with that one as it is standing on edge and the wind could have scooped out the space. However most of what I have seen are like this image where the scooped area is vertical not horizontal. Wind doesn't blow up through the ground and it stops when blowing down into it.
A is a block with a curved face.
B is another curved face but look at C which is really curious. It is an angled part. Add to that the squared corner that separates the curve from the angle.
along with the scooped out or dished out rocks all over this place, I also noted many square blocks which I'll put up later, and many rocks that are split so perfectly that the surfaces are completely flat. Many of these rocks are also missing the second piece. Some are lying together and you can see both sides, but many more are alone. Very strange. I point to three flat faced rocks in this single image A,B,C. I also point to D which is a pyramid shaped rock. There are also a lot of these all over. Since they were around on the viking site and the pathfinder site, I'm inclined to think they are the tops of posts or columns like finials.