Zelda II - The Adventure of Link (Zelda 2) Walkthrough on Nes: From the labyrinth to the palace on the sea
Map of Hyrule's second island

Leave the labyrinth island by taking the river. Cross the forest and enter the cave passing under the mountain.

Cross the cave, descend to the village, and enter the water, following the route that starts from Nabooru.

At the level of the "2nd square" on the far left at the top of the mountain to the South, go up (1). When the sea blocks you, head to the right. At the very end is a heart container (3).

If needed, return to replenish life and magic at Nabooru because the statue at the entrance of the palace does not contain a red potion. Then head directly East without changing direction and enter the palace on the sea (save file).