Landscape artist Peter A. Nisbet discusses his reasons for painting at Grand Canyon National Park, sharing his inspirations and experiences. "Without question this is the greatest landscape on Earth for painters. A landscape painter faces more challenges here than anywhere else on the planet. You've got light moving quickly, you've got forms that are incredibly complex, you've got an array of colors that are beyond description, you've got a time issue of the sun clocking overhead. You have to finish these paintings in two hours or you are just painting a moving shadow."