Water is fantastic subject matter for photographers, providing numerous ways by which we can perceive the world. It can be transparent, allowing light to pass through and reveal the world below its surface. When translucent water only partly reveals and, as a consequence, maintains a sense of mystery with what lies below.
In the landscape it is the reflective nature of water to which photographers are usually drawn. Weather patterns move across and interact with the surface of the water, mirroring the many moods (placid, turbulent, etc) of the sky above.