This image of the Salt River in Wood Buffalo National Park shows its distinctive limestone and gypsum cliffs. Middle of the day light is rarely flattering to the landscape. I shot this image around 2 p.m. using a 2-stop neutral density filter to hold back the exposure of the clouds. This keeps the highlights from becoming overexposed. Later when I processed the image with Photoshop, I adjusted the contrast and tone of the image further to add drama and interest.