Eldin Spring

From Zelda Wiki.org

Eldin Spring is located right in the front entrance of Kakariko Village in Twilight Princess. There Link will find the third of the Light Spirits, Eldin. He will ask Link to retrieve his light from the Shadow Insects so that his province will be released from the Twilight. Once Link obtains all the Tears of Light, he will return to his human form and continue with his quest.

In the Cave of Ordeals, when Link reaches the 30th floor, the Great Fairy will release smaller fairies into the spring.