For me, it was Secret of mana and chrono trigger. Secret of Mana had a way of glowing luminously, and portraying water, trees, and light in such beautiful ways. When I was a kid, I wanted to go into the world and take a picnic. C: Specifivally the road near Pandora. The water always looked so sharp, clear and inviting...
Chrono Trigger was really beautiful as well. There was such a sense of atmosphere in every place. The present era was so green, but in a way, so haunting. There always seemed to be something missing there. And the mideavel age was misty, and mysterious. Rough and barbarous! The future was cold and desolate. The ancient time was great as well. So wild, such a sense of awe at the scale of things. And, most of all, Zeal! Zeal really speaks for itself, so serene and surreal, with it's bright halls and enchanting sounds. Zeal was one of the most vivid expressions of place I have ever seen.
Just to mention, Super Metroid was pretty cool. It was much less engaging, but it was really quite subtle in it's space.