Now from the thumb nail it looked like a planet with a ring. Now that I see it up close, well it certainly is an alien terrain. But is there anyone home? not sure, there does not seem to be any lights on. Maybe they know we are here and are hiding and waiting. Or perhaps there has not been anyone here for a very long time?
The sphere I would say has its own gravitational center, and this is the alien's version of Roman architecture. The sand stone is still perfectly intact, but what ever they may had used for roof has long rotted away. or maybe they did not have roofs?
Yeah I always see architecture in this stuff, but I can't help it Architecture is what I do for a living