Deku Forest (Oracle of Ages)

Deku Forest is Fairies' Woods in the past.

You will originally be in Faries' Woods while you are going to the Wing Dungeon but once you pick up the rock the entire Dungeon crumbles. You will then be told by the Maku Tree to go back into the past to find a way into the dungeon there. Once you're in the Deku Forest you will almost immediately find the Wing Dungeon, but you can't enter because you do not yet have the bombs. Some of the people here will tell you that if you find a Mystery Seed Queen Ambi will give you a prize.

So after you've found that and go back a couple of screens a guard will then take you to the Palace. Here Queen Ambi will give you the Bombs. Now you can enter the dungeon in this area and with some exploring in the Deku Forest you will also find a Heart Piece.