Zelda: Ocarina Of Time Master Quest Part 39: Nearing The End...

We're finally coming to the end of this place! Whoo! There's just that mysterious room with a gate and a chest left inside that I can't seem to find the solution to. "Maybe" I'll go back to it later in some sort of wrap up part if I can find what it is I'm looking for to open that gate. I assure you it's not essential for 100%ing the game, though it would be nice to get all the chests in every dungeon to clear the maps.

Edit, I figured it out within the last 5 minutes of uploading this video. You'll see how in the next part.

Enjoy!