I only recently discovered Leontyne Price while looking for a song for the soundtrack on "A Room with a View." From that (also gorgeous) song, I clicked on this one:
And it also was beautiful and seemed so full of longing, that I thought to look up the story behind the song. Long story short, there's folktale about a rusalka- a sort of water spirit in Eastern European folklore across several countries - that appears to be the original story behind "The Little Mermaid." This folktale was made into an opera, and the "song to the moon" is similar in intent to disney's "part of your world." Basically the rusalka wishing she could be a mortal woman because love for a mortal man has filled her with longing.
Anyway, I thought it was an interesting discovery.
And the singer, Leontyne Price, she herself, her voice, is gorgeously moving.