Triangle Islands
The Triangle Islands are three small but major islands in The Wind Waker. In the beginning of the game, each island has a statue about the size of Link in the middle of it. The King of Red Lions tells Link that each statue needs to have a pearl to help unlock the Tower of the Gods, which will evantually lead Link to Hyrule. All of the islands themselves are actally shaped like triangles, and on Link's map are placed to that lines can be drawn between them forming a triangle.
Eastern Triangle Island
"Tell me, small fry... Have you ever caught a fairy before? 'Cause from what I've been told, when you've been beaten to a pulp by monsters and such, and you think you've finally met your match... If you've got a fairy with you then you've got nothing to worry about. Don't you wish you had something handy for carrying fairies around with you, fry? If you want one, go south from here until you see a miserable-looking submarine floating on the sea. Look there!"
Eastern Triangle Island is located two blocks north of Forest Haven. It is home to the statue of Farore, and requires Farore's Pearl to be held inside the statue. It is surrounded by Updrafts, proving it a little difficult to get to the island.
Southern Triangle Island
"A famed pictographer lives far to the north of here in Windfall Island. He's apparently real wise and talented in the ways of pictography. He's even said to have legendary pictographs that he treasures above all other things. He keeps them hidden away in a secret safe, or so they say. By the way, small fry... What exactly is a pictograph, anyway?!"
Southern Triangle Island is located one block west of the Private Oasis. It is home to Nayru's statue. This is one of the hardest of the Triangle Islands to get to, considering there are Seahats patrolling around and will attack Link when he ventures near it.
Northern Triangle Island
"Let me tell you, something, small fry... The school on that Windfall Island has one gorgeous teacher! But the thing is, this gang of four little hoodlums is always causing trouble for her. Those little delinquents like to cause all sorts of trouble. They go climbing trees and hiding behind buildings instead of going to school... What a bunch of savages. Somebody's got to scold these scoundrels and set them straight for the sake of that poor teacher! You hear me, fry?"
Northern Triangle Island is located one square beneath of Windfall Island. It is home to Din's statue and requires Din's Pearl. The island has no defenses to surround it, except for a cyclone if Link hasn't already befriended Cyclos.