The Spinoza Institute in the Netherlands is a legal company that offers a psychedelic experience in several stages (exchange with one of the mentors / online preparation / feedback) and which includes a 24-hour retreat with psychotropic drugs, including natural psilocybin (herbal teas) and mushrooms (with music, meditation). The claimed objective of this transformative experience is to reach a deeper level of consciousness through an absence of mental filters: "to go to the meeting of oneself, to reconnect body and mind, to know oneself better, to change something in oneself, to break with patterns, to return to nature". Maarn, Netherlands.