Two-Eye Reef

In The Wind Waker, the Two-Eye Reef is one of the reefs of the Great Sea with two round reefs in the center, resembling one side of a six-sided die. If all the gun boats and gun turrets are destroyed, a Treasure Chart that leads to the Secret Cave Chart will appear.

A Great Fairy can be found on the outskirts of the reef. A cannon is used to kill the Big Octo. Once the Octo is vanquished, the Great Fairy will appear, thanking Link by doubling his Magic Meter.

Once Link has the proper Triforce Chart, he will be able to retrieve a Triforce Shard from the bottom of the sea.