Kula in Korok Forest wants to see a whirly water circle in a big lake.
Quest Location
You can start this quest in Korok Forest after you complete Trail of the Master Sword. Talk to Kula to start the quest.
How to Complete the Quest
You will find the whirly water circle in Lake Hylia. After you show the picture, Kula asks to see a swirly sand circle. You can find these in Gerudo Desert.
Quest Reward
Kula gives you 5 Endura Carrots.