When I entered the actual volcano in Eldin Volcano and dove off the metal platform, I landed on a tall rock platform witha Goddess Cube on it. I hit it witha Skyward Strike and it shot into the sky, but when I returned to the sky to open the Goddess Chest, I saw no indication of where it was on my map!
What gives? I've struck at least a half dizen other Goddess Cubes and they all showed up on my map in the Sky. Where's my treasure!?