Corrupted Zones are a category of activity in Horizon Zero Dawn.
Corrupted Zones are small areas of the map where there are significant numbers of Corrupted Machines. The ground also has a red glowing effect. Unlike other areas where corrupted machines are found, Corrupted Zones have no relevance to the overall plot, and have no sign of the Eclipse or Corruptors. Corrupted Zones appear on the map as a red circle, with the symbol for corrupted machines in the center.
Corrupted Zones serve as side-quests and an extra challenge. To complete the quest, the player must destroy all corrupted machines, clearing the area of the corruption. Once this has been done, the areas will become safer, the player awarded experience, and the dead corrupted machines provide a fair amount of Metalburn.