The United States
I have seen a lot of people come in and out of Iquitos looking for the best place to try ayahuasca. Most of them seem like a cattle call, 15 or 20 people headed out into the jungle to do large group ceremonies. Kawsay offers that personal touch that William provides. You get a ton of one on one time with his excellent shamans, Romolo and Winister. These guys are true professionals.