Like Kneipp, Preissnitz, Rikli, Kuhne and Just, Felke is one of a number of influential lay practitioners who played major roles in developing naturopathy in the early 20th century.
Kneipp won a Gold Medal in the mixed doubles at the 2006 Commonwealth Games, partnering Natalie Grinham.
There are spas like Bad Salzuflen, Bad Lippspringe, Bad Meinberg and Bad Driburg, as well as numerous climatic and Kneipp spas, on the edtge of the Teutoburg Forest.