There are 4 Heart Containers available in Hyrule. If you find a Container just touch it and you will pick it up.
LOCATION: South of Parapa Palace.
Items Needed: None
Once you arrive at Parapa Palace follow the beach down to a Stonehenge looking location. On your way down you will encounter an event tile in which bubbles are shot up from off-screen. Make it across this tile and enter the Stonehenge tile. Proceed right until you see a Heart Container on the floor. Watch out for the boomerang throwing enemy as you approach it.
Location: South of Rauru village
Items Needed: Hammer
Simply break the rock south of Rauru village then look to your right destroy the rock
blocking a cave. Enter the cave and go to the end there you will find the second Heart Container.
Location: East of Nabooru village
Items Needed: the Raft and the Jump spell
Head East of Nabooru and use the raft to cross the water until you reah a small island. Head West 10 paces then 4 paces North. You will enter an event tile. Now simply cast Jump and grab the Heart Container.
Location: South of Nabooru village
Items Needed: Raft and Flute
Proceed to use the Flute on the River Devil. Continue following the path until you reach three rocks. Head East along the beach until you reach the event screen. The Heart Container will now be in your grasp.