You plant a magic seed there as a child which is right next to the entrance, then when you go into adult Link, the seed should have grown into a platform. Step onto it and it should lift you to above the entrance for the piece of heart.
Longshot
Go to Hyrule Castle, sneak past the guards, and when you meet Princess Zelda, she'll give you Zelda's Letter. You can use it to go to Death Mountain Crater.
Inside death mountain crater. u can enter from goron city after you have the goron tunic go behind the statue in darunia's main room
Goron City is on top of Death Mountain.
You go to the fire temple (death mountain crater)
put on your iron boots and walk over or around it.
In Haunted wasteland :).= = = =
Ahoy, there. o/ Hyrule Castle (Hole behind a boulder) Death Mountain Trail (Next to Death Mountain Crater passage on the top) Zora's Fountain (On a wall that has a yellow and a silver boulder, place a bomb between those two boulders) Death Mountain Crater (Megaton Hammer needed) Desert Colossus (Between two palm trees. Blast the cracked wall) Ganon's Castle (Golden Gauntlets needed)
Its in the dondongos cavern in death mountain, right next to one of the doors on a ledge in a large treasure box.
In Ocarina Of Time, There's a guy @ the gate to death mountain in Kakariko village, show him the letter (Note, this is the village, NOT in the forest where you'll spawn)
you go around it
No idea what your asking o_O but im gunna say... Go to Kakariko Village and show the letter (card) to the guard in front of the gate leading to death mountain www.OrangeSpy.tk
u need red tunic