7 Day Nature Challenge on Facebook #challengeonnaturephotography. My challenge nomination came from Dee Hudson, and each day I will nominate a fellow photographer to post one nature photo each day for 7 days. Also, keep the challenge going and nominate a new photographer each day. Day 1 Beargrass, Glacier National Park Day 2 Grand Teton Reflection, Grand Teton National Park Day 3 Â Terrace at Mammoth Springs, Yellowstone National Park Day 4 Ribbon of Gold, Pine Plantation, Michigan Day 5 Red Trillium, Lyman Woods Forest Preserve Day 6 Red Pine Plantation Impressionism Day 7 Cyan Snow Abstract