I've always wanted to take a course by Wim Hof. I bet that combining his knowledge with the benefits of cold water therapy may have even greater health applications than we are currently aware of.
http://www.icemanwimhof.com/en-home
He runs shirtless, barefoot marathons in negative Fahrenheit weather.
http://www.icemanwimhof.com/en-home
He runs shirtless, barefoot marathons in negative Fahrenheit weather.