The Vipassana silent courses put on by dhamma.org are entirely free, run by volunteers. The popular locations are fully booked months in advance, but if you hav

The Vipassana silent courses put on by dhamma.org are entirely free, run by volunteers. The popular locations are fully booked months in advance, but if you have a very flexible schedule you can get on the waitlist and be accepted right before the course, that is how I did my first one. I've done two 10-day courses from them. After my first one I described it to people as like being in prison, never having gone to prison, but with less freedom than prison. But I still went back for a second time :)