Zelda II - The Adventure of Link (Zelda 2) Walkthrough on Nes: From the Sea Palace to the Palace of the 3 Eyes
map of the south of the second island of Hyrule

Leave the palace and head south. In front of the river demon, use your flute with the B button to make it disappear (1). Follow the path through the action phases without getting hit too much. Climb into the swamp along the wall (5) to get a life (6).

Go into the swamp cave and cross it to get a 500 experience point bag. Leave the swamp and head East. Enter the cave north-east of the forest.

Use the "fire" magic in the first part of the cave to eliminate the Tektite then cross the second part while avoiding or killing the lizardmans.

In the forest, hit with the hammer to discover the hidden town of Kasuto. Speak to the woman in purple who comes out of her house and follow her to get the last magic container and exit the house.

Enter the green house then the small door towards the back of the room. Go talk to the old man at the back of the cellar to get the spell magic. Go to the very end of the town and use the "spell" magic to make a large door appear. Take this door to get the magic key.

Leave the village and cross the cave again then head south. Visit the forest (2) to find a 500 experience point bag.

Walk along the coast to find a heart container then go West to the 3 stone blocks. Place yourself between the 2 bottom blocks (3) and use the flute then enter in the palace of the three stone eyes which just appeared (save).