Winner zones is awarded to the turfer who has managed to win a game in Turf. To win a game in Turf it requires that you have been the turfer in the world who amassed the most points during the current round. Since round 46, the winner zone is also awarded to the winner of the medal Country medal.
Most winner zones are in Sweden (117), followed by Finland (92) and Norway (88). The most taken winner zone is SunYourZone, located in the municipality of Västerås in the region of Västmanland in Sweden.
More information about the winning zones is available here; List of Winner Zones.