Which of the following is NOT a major terrain feature found on a map?

A lake is not classified as a major terrain feature on a map, whereas hill, valley, and ridge are included in the major terrain features. Major terrain features specifically refer to land formations that significantly affect the movement of troops and vehicles, visibility, and other tactical considerations. Hills, valleys, and ridges are all essential in understanding the landscape for strategic planning, as they create variations in elevation that can impact operations. Lakes, while they can be significant in terms of terrain utilization or obstacles, do not form the same kind of impactful landforms used for navigation and combat planning as the other options represent.