Landscape photography is a wide open subject, both literally and figuratively. As the photographer, we have to decide the intended subject, message, or purpose of the image we shoot, beyond being just a pretty picture.
Even with landscapes, I often shoot to focus on shapes, textures, and colors rather than on a specific subject. In this image, I was struck by the textures of the foreground and background greens, as well as the background blues of the sky and water. To me, all of the natural elements--earth, air, fire (this is a lava field in Iceland), and water--are represented here, making this a powerful image.
As you photograph a landscape today, do so with intention. You may also want to try a "less is more" approach and see what happens. You may be pleasantly surprised!