Instructions
Fly to Muddy Island. Turn right and run through the village toward the line where muddy water becomes blue ocean.
Surf the Muddy Sea. Avoid the two trainers swimming in the water and follow the grey border rocks to the large brown boulder that looks like a heart. Swim down along the grey rocks until you find an opening between two heart-shaped boulders.
Swim up and to the left, following the path to the cave opening. Enter the cave and arrive at Peace Tower.