It's often the extra elements that add drama to a scene. Look for clouds in the sky, rather than a clear or overcast sky. And if there are clouds, try using a longer shutter speed to capture their motion. You can also try shooting from unusual angles to give viewers a different perspective on a scene. Framing low, for instance, or overhead looking down. Finally, dramatic landscapes are all about the light. Shoot at the golden hours of dawn and dusk when lighting is more dramatic.