I was replaying the original Legend of Zelda and got lost trying to remember where the hell the 7th dungeon was. I had every one of them opened but that one. I even cleared the eigth dungeon, but couldn't get into the ninth with a missing triforce piece. Forgot about that whole whistle/waterpool thing, but I couldn't even find the right place. Now that I got it, all I need to do is beat that dungeon to go onto the last.
The Omni-Wonder of the Universe has spoken
~cackle ~cackle