Fera is a well enthusiast who wants to visit every well in Hyrule. She will pay you to tell her about the wells you find.
Quest Location
You can start this quest by going into any well in a town or near a stable. You should find Fera there. Talk to her and say that you are a well enthusiast. After she pays you for any wells that you have found, she will go to the well in Lookout Landing.
How to Complete the Quest
Go to every well in Hyrule. Whenever a well is added to your map, you can talk to Fera in the well in Lookout Landing to get paid for each well that you have found so far. She will tell you how many wells are left.
Quest Reward
After you have found all of the wells, Fera gives you the "All's Well", a key item.