Film Bufo Alvarius: The Underground Secret (2018) Sous-Titres
- Genre : Documentary
- Duration : 78 min
- Directors : Filip Zaruba
- Actors : Stanislav Grof
- Year : 2018
- Synopsis : A radical testimony of the strongest known natural psychedelic, tryptamine 5-MeO-DMT produced by Bufo Alvarius, a toad of the Sonoran desert.
