You’ll begin in an underwater tunnel. You are to swim through it, and it isn’t all that long of a journey, especially considering how long Link can hold his breath. Nintendo went ahead and scattered a bunch of air bubbles (which fill up your breath supply) throughout here, so may as well get used to swimming. We’ll be doing quite a bit of it soon enough.
At the end of the tunnel, you’ll emerge into a large room. Climb the vinery nearby to a high ledge, then get onto the hanging platform. Take out your Gust Bellows and start blowing the Froaks into walls and stuff to get rid of them; try blowing one into the Bokoblin for convenience. Make sure any other Froaks aren’t in your way, then line your facing up with the second platform and let those Bellows blow! Use it like a swing, where the wind is the force moving the swing, and dash and jump onto the platform when ready.
Defeat the Bokoblin and repeat the above process to reach the next hanging platform. There, exit the room to reach a ledge going around the Great Tree.
Outside, climb up to the ledge with the heart flower. Grab the aforementioned heart if needed, then look at the ledge on your right and down to find a Goddess Cube. Properly line up with it and drop down to it, then hit it with a Skyward Strike.
Seeing as you dropped down, you’ll need to go back through the underwater tunnel and all that crap. See you back outside!
This time around, simply climb up the ledges towards the crown of the tree. Soon enough, you’ll come along to some vinery with Walltulas crawling all over it. Use the Slingshot and/or Gust Bellows to get rid of them, then climb up and left, jumping over the gap when it comes.
On the other side, look up to find some more Walltulas and a Deku Hornet nest. As annoying as it’ll be, you’ll need to shoot down the Walltulas and the Deku Hornet nest. For the latter, hope you have the Bug Net!
After getting stung half-a-dozen times, climb up the vines and continue the up-and-left thing. On the higher ledge, you’ll come across a room there. Go inside.
Here, you’ll find a fat Moblin standing guard at the end of this very linear (and short) path. It would take you too long to beat him the old-fashioned way, trust me, so what to do?
I tend to dash straight at them with their shields up, kind of using the shield as a mini-ledge. Often, I manage to jump over successfully within a jump or two. Do whatever you want, then exit.
Back outside, utilize the nearby Bird Statue and simply go along the path set in front of you. Not much to mention along the way. You’ll have to fight a few Bokoblin, and an Amber Relic is in one of the nearby alcoves.
Speaking of those alcoves, go to the first one you come across and look over the edge of the ledge. On a below ledge, you’ll find a Goddess Cube. Line up with it, much like before, then dash-jump off the platform. Assuming you land on the proper ledge, hit the Goddess Cube with a Skyward Strike.
And then, drop off – you have to work your way back up there. See you in a few minutes…
From the alcove place, continue along the path to fight some Keese. Meh. A bit further along the path, you’ll find a ledge splitting off from the main path. Get on it and look down to find gasp another Goddess Cube. As usual, line up with it and dash-jump to the empty platform below. Go across the tightrope to the other side, then activate the Goddess Cube with a Skyward Strike.
Then drop off, for the last time at least, and work your way back up the tree.
After arriving, simply continue back up the path all of the way to the top of the tree. There, Fi will tell you that it is the top of the tree. Nearby, you will find a Kikwi sleeping on a tree branch. Shoot ’im with the Slingshot to awaken him. Speak with for a while to learn of the gate in the south.
However, the gate is not complete, so we have to do that first. Drop out of the tree. At the risk of sounding clichéd, BOMBS AWAY!