Today we celebrate Bicycle Day, a modern semi-holiday (unrecognized by official governmental agencies yet observed by psychedelic enthusiasts across the globe) that commemorates Swiss chemist Albert Hoffman’s bike ride home from his lab on April 19th, 1943, after ingesting 250 micrograms of lysergic acid diethlymide, and in the process creating the world's first recorded intentional LSD trip. When Hoffman originally synthesized the compound in 1938, in the Sandoz Pharmeacuticals laboratory in Basel, he had deemed it next to useless, and put it up on the shelf to be forgotten — but five years later, something within him told him to take a second look. The rest, as they say, is history. Today’s Voices of Esalen episode is a treasure drawn from our extensive archives — an interview with Albert Hoffman himself, conducted by none other than Stanislav Grof, sometimes known as the godfather of LSD psychotherapy. This interview was conducted at Esalen Institute in 1984 — just one part of the ever evolving and complex tapestry of history that unfolded here in Big Sur.