Eldin Spring
Eldin Spring is located right in the front entrance of Kakariko Village. There you will find the third of the Light Spirits, Eldin. He will ask you to retrieve his light from the parasites so that his province would be released from the Twilight. Once you obtain all the Tears of Light, you will return to your human form and continue with your quest. In the Cave of Ordeals, when you reach the 30th floor, the fairy will release smaller fairies into the spring.