Ben Underwood developed a skill with echo location that is phenomenal. This video introduces him:
I like this story because it is both inspiring and cautionary. Ben is amazing, but he is full of hubris and it is only when he meets Daniel Kish that he is forced to face this. And the killer, the real killer, is that Ben's life ends short. He died at age 16 from the cancer that first took his eyes. But his life story is both inspirational and a blow to the gut. That is life with its ups and downs.
Here's a web site dedicated to Ben Underwood.