Wishing Well is an Achievement in chapter 1.
To complete this you need to be a pretty mean person. As you walk down the path in Chapter 1 you will come across a young girl playing with a ball. Pick up the ball with http://brothersataleoftwosons.wikia.com/wiki/Younger_Brother and take it to the well by the woman sweeping with a broom. Drop the ball down the well,then it will show you have gotten a achievement!
Well Done.You stole a ball from a young girl, hope you're proud of yourself.