Yeah I agree. I know it's on a creaking old Wii now but that game should be the blueprint for every designer in gaming and filmmaking who work on level and set design for alien worlds, ambient forests, epic vistas, giant mechanical worlds coming to life, ruined civilisations, sci-fi interiors... it's got it all. More imagination in the enemies and scenery of that game than just about everything else I've experienced.
As much as BOTW is the better game mechanically, I will never get over how stunning it was to explore those Bionis for 100+ hours. The fetch quests and battles go boring, but the art direction, music and design never, ever did. XC X had some great landscapes too (and some of Mira, especially the giant desert parts with epic alien structures in would have made epic Alien sets) but as a game, it sucked in comparison.