Dimensions taking reservations for cannabis-assisted psychedelic therapy retreat in Algonquin Highlands. Lovers of psychedelics who are looking for a wellness restart while enjoying a biodiverse forest and the calming waters of a nearby lake can check out a new retreat on Maple Lake in Haliburton Highlands, less than a three-hour drive northeast of Toronto. Dimensions, which provides retreats in Canada, Costa Rica and Jamaica, offers psychedelic-assisted therapy programs designed to help get people where they…