Okay, let me see...
The pink reflections, I think I've seen before. It's just a lighting effect. No big mystery.
The moon is, um, the moon? Possibly also the inspiration for Space Colony Ark, but I doubt it. I don't see anything out of the ordinary; that's just how it looked in MM. Why? Your guess is as good as mine.
There's definitely some kind of symbol carved in the bottom of the pillar in the upper-left screenshot, but I can't make it out.
With the Hyrule Castle picture, I can barely tell what's being indicated, save for the mysterious black dot on the right. I have no idea what that might be. I do kinda wonder why the drawbridge is down at night, unless that's from the cutscene wherein Ganondorf chases Zelda and Impa.