It might be easy to forget about, but the NASA Mars Rover Opportunity is still going. And recently it sent back a big panoramic view of where it currently was, just a short time ago. It isn't spectacularly scenic, but it is on Mars.
Two choices here. I recommend going full-screen with the browser and then clicking the pic, to get it full-size. And then you can imagine you are looking through a window at the surface of Mars.