and this:
Not to mention this:
And the last on is one I can't show because I pulled it off the official nasa photo's a few years ago and I only have the photo on my computer. It is large and looks like an "underground subway station" or such that has been exposed to the surface.
There is also this: https://www.dailymail.co.uk/sciencetech/article-3339949/Mystery-DOME-Mars-Alien-hunters-say-structure-built-ancient-civilisation-red-planet.html Frankly, just go to google images and search structure on mars to get a bunch of stuff that is just silly, and a bunch of stuff that makes you think.