Northeast of here is the Forest Haven...
Angular Isles are two odd-looking islands at the southern end of the Great Sea in The Wind Waker. Located at E7 on the world map, they are not far away from the Forest Haven. Surrounding it to the west is Two-Eye Reef, to the east is Boating Course, and to the north is Ice Ring Isle.
These islands are completely made out of blocks, that Link can move and climb on to reach the higher levels of the greater island. A treasure chest containing a Piece of Heart is waiting to be found on the highest level.
The smaller island can be reached by using the Deku Leaf or the Hookshot. A hole can be found there, providing a block-puzzle that will grant you 200 Rupees if solved. (Note: The Mirror Shield is required to do so)
Step 1 - Pull the block from the left to the other side.
Step 2 - Pull the next block halfway on top of the first block.
Step 3 - Go down and pull the first block out a bit more.
Step 4 - Go up and pull the other block so the next one can fall down.
Step 5 - Repeat with the next blocks until you have some sort of stairs.
Step 6 - Go on top of it and reflect the light with your Mirror Shield in a way, that it shines on the chest there. It will turn solid.
Step 7 - Use your Deku Leaf to reach the chest.
The Blue ChuChu is on top of the largest island, next to the treasure chest.
- ↑ "Northeast of here is the Forest Haven... They say a truly unique kind of firefly is indigenous to that place. You heard of it, small fry? It emits bursts of light in seven colors! Supposedly it's as beautiful as a rainbow! If you want to capture one though, you'd best have a bottle to keep it in." — Fishman, The Wind Waker.