"Aye," Will replied to Katara's question, nodding solomnly. "World's End is only found after you have become completely lost and it is just that. The place where the world ends and the locker begins." He rubbed his chin thoughtfully, remembering the first time and Barbossa's ease with the moment while Will had panicked, tried to steer them away from the waterfall.
It occured to him briefly that their first ship had shattered that time but the Dutchman was no ordinary ship and as Jack had explained, they had a waterbender. Which he wasn't quite sure what that was. "What is it that a waterbender does?"