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  1. Aspen trees (Populus tremuloides) in fall colors, Gunnison National Forest, Colorado
  2. Aspen trees in fall colors on Elk Mountains, Capitol Creek trailhead, Colorado
  3. Bald Cypress at upper Blue Basin, Reelfoot National Wildlife Refuge, Tennessee
  4. Beach near San Simeon Creek with ice plant in the foreground, Big Sur, California
  5. Birch forest, Pictured Rocks National Lakeshore, Michigan
  6. Bixby Bridge, Big Sur, California
  7. California Poppy and Desert Bluebells carpeting a spring hillside, California
  8. Cascades at Emerald Pools, Zion National Park, Utah
  9. Cascades at Emerald Pools, Zion National Park, Utah
  10. Cathedral Rock reflected in Oak Creek, Red Rock State Park near Sedona, Arizona
  11. Cedar Creek flowing through deciduous forest, Petit Jean State Park, Arkansas
  12. Cinder Cones and Joshua Trees, Mojave National Preserve, California
  13. Claret Cup Cactus and Verbena, detail of flowers in bloom, North America
  14. Cloud over White Sands National Monument, Chihuahuan Desert, New Mexico
  15. Cottonwood (Populus sp) trees, fall foliage, Carson Valley, Nevada
  16. Cottonwood trees and Willows, Bosque del Apache National Wildlife Refuge, New Mexico
  17. Court of the Patriarchs rising above river, Zion National Park, Utah
  18. Crescent moon over El Matador Beach, Malibu, California
  19. Devil's Garden sandstone formations, Escalante National Monument, Utah
  20. Dream Lake, Rocky Mountain National Park, Colorado
  21. Elephant Rock, a unique sandstone formation, Valley of Fire State Park, Nevada
  22. Firehole river, Yellowstone National Park, Wyoming
  23. Fremont Cottonwood tree, White Sands National Monument, Chihuahuan Desert New Mexico
  24. Full moon over Mono Lake with tufa towers and Sierra Nevada Mountains, California
  25. Geissler Mountain reflected in Linkins Lake, Colorado
  26. Gothic Mountain and Beaver Lodge, near Crested Butte, Colorado
  27. Grand Canyon, Grand Canyon National Park, Arizona
  28. Gunnison National Forest in fall, Colorado
  29. Gypsum dunes, Guadalupe Mountains National Park, Texas
  30. Hot Creek at sunset, eastern Sierra Nevada, California
  31. Ice on the Colorado River beneath sandstone cliffs, Cataract Canyon, Utah
  32. La Sal Mountains and Globemallows, Salt Valley, Arches National Park, Utah
  33. Laurel Mountain and Convict Lake, eastern Sierra Nevada, California
  34. Little Missouri River, Theodore Roosevelt National Park, North Dakota
  35. Lone pine tree with East and West Temples in the background, Zion National Park, Utah
  36. Lower Yellowstone Falls and Grand Canyon of Yellowstone National Park, Wyoming
  37. Lower Yellowstone Falls, Yellowstone National Park, Wyoming
  38. Lunch Creek Cascades, Glacier National Park, Montana
  39. Boulder and deciduous forest, Cades Cove, Great Smoky Mountains National Park, Tennessee
  40. Camel Butte rising from the desert floor, Monument Valley, Arizona
  41. Chisos Agave (Agave havardiana) and the Chisos Mountains, Big Bend National Park, Texas
  42. Dolomite Peak and Bow River backwaters, Banff National Park, Alberta
  43. Field of sunflowers, Flint Hills National Wildlife Refuge, Kansas
  44. Full moon over boulders at El Pescador State Beach, Malibu, California
  45. Geissler Mountain and Linkins Lake, Colorado
  46. Mammoth Peak, Upper Dana Meadow, Yosemite National Park, California
  47. Maroon Bells and Maroon Creek in autumn, Colorado
  48. Marsh, Padre Island National Seashore, Texas