Hidden In The Alcove Across

Go back into main room and a gate will open to enter. There is a door on the left to enter and you can subsequently drop down into a tunnel. Raise the platform up to the passageways in the wall by pushing the column in the center of the room. Go into the passageways and find the chest containing the small key. Go back to the column and rotate it back around to lower the platform. As it lowers a door will show that you use the key to unlock. Turn into wolf Link and go into the next room. Make sure to avoid the spikes as you make your way over to the chain to the right of the door. Pulling the chain opens the door so that you can quickly run into the next room before the door shuts.

In the next room, there will be blades to avoid but maintain your course so that you can find the jar containing the Oocoo. Keep going through the door on the left and make sure to roll under the spinning poles that await you. There are three skeletons to defeat including one hidden in the alcove across the sand pit. After defeating all three, a gate will open in the previous room. Go to the spinning pole room and proceed on the path that has been opened. Go down the path and head through the door, jumping the gap on your way.