Ernst Jünger
One of the best known psychonautical works is Aldous Huxley's "The Doors of Perception". In addition to Ernst Jünger, who coined the term, the American physician, neuroscientist, psychoanalyst, philosopher, writer and inventor John C. Lilly is another well-known psychonaut. Lilly was interested in the nature of consciousness and, amongst other techniques, he used isolation tanks in his research.