Stillness
also known as Dark room retreat, yang-ti
Days alone in complete darkness. Prolonged absence of light reliably produces visual and perceptual phenomena with nothing ingested, and the experience tends toward stillness rather than intensity. Length is the main variable, and three days is a very different proposition from fourteen.
The room is light-sealed rather than merely dark: no glow under the door, no phone, no watch. Meals arrive through a light-locked hatch on a schedule you cannot see. You sleep when you sleep, which within about forty-eight hours stops mapping onto day and night.
The visual phenomena are the part people ask about. They are well-attested and they are not the point. What most people report as significant is the loss of external structure: no clock, no faces, no tasks, and no way to distract yourself for hours at a stretch.
This is the closest thing on this page to an unaccompanied psychedelic experience, and it deserves the same caution. Start at three nights. Any centre that encourages a first-timer straight into two weeks is selling rather than guiding.
The shape of it
A representative shape drawn from how these are typically run. Use it as something to ask against, not as any one centre's timetable.
Where to do it
Chosen for institutional standing rather than atmosphere: a named founder, a registered charity or non-profit, a published lineage, decades of operation, a price you can read before you enquire. We have inspected none of them, and each entry says what its standing actually rests on.
Cascade-Siskiyou wilderness, Oregon, USA
Purpose-built underground rooms in the southern Oregon wilderness, run by Scott Berman with a background in psychotherapy and Buddhist practice. Books out far ahead and runs a waitlist, which is a better sign than instant availability.
Mazunte, Oaxaca, Mexico, and near Lyon, France
Three purpose-built dark rooms, each with ventilation, private bathroom and a light-protected food box. By some distance the most affordable way to try this, and the only major centre that will take you for a single night. Also runs a long-standing silent meditation programme, which is a saner starting point for most people.
Colorado, USA
A single-facilitator operation rather than an institution. Listed because small guided retreats are a legitimate format and the US options are thin, but the usual caution about one-person operations applies: ask who covers an emergency.
No centre has paid to appear here and no link on this page earns us anything. If that ever changes it will be disclosed on the listing itself, not in a footer.
The other half
The retreat directory covers centres in the jurisdictions where the substance they serve is lawful, licensed or unscheduled. Read the contraindications first, because a lot of people who start there end up back on this page.
The dispatch
A brief, sent only in weeks when something changes: jurisdictions that shifted, listings added or revised, and the research worth reading. No hype, no sourcing talk.
Educational only. Not medical advice. Unsubscribe any time.