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  1. Dusk view of Georgetown U. above Key Bridge over the Potomac River
  2. Cormorant fisherman poles a bamboo raft near limestone karst mountains, Li River, People's Republic of China
  3. Virginia Creek, with a cross-country skier, Yellowstone National Park, Montana
  4. An orange-beaked great white egret hunting among wetland lily pads
  5. Banff National Park, Alberta, Canada
  6. Reelfoot National Wildlife Refuge, Dyersburg, Tennessee
  7. Pinedale, Wyoming
  8. Waterfalls on the Eno River passing through a hardwood forest
  9. Sunset and silhouetted oak tree over the Shenandoah valley
  10. A delicate and splendid rose opens up her petals
  11. A dirt road through a forest passes a large tree with Spanish moss
  12. A roaming horse in Montana
  13. A view of Death Lake and the surrounding forests and cliffs, Northwest Territories, Canada
  14. A close up of a bear with paw raised and claws exposed
  15. Kitty Hawk, Bodie Island, North Carolina
  16. A creek runs through Blue Hole Campground
  17. Grand Teton National Park, Wyoming
  18. A view of wild horses in a field of wildflowers in the Pryor Mountains
  19. A view of a lake through trees and plants
  20. Crater Lake National Park, Oregon
  21. Prairie grass, Badlands National Park, South Dakota
  22. Bleeding heart flowers, Dicentra spectabilis, in bloom
  23. Alberta, Canada
  24. Green Gardens, Gros Morne National Park, Newfoundland, Canada
  25. Grand Teton National Park, Wyoming
  26. Boundary Waters Canoe Area Wilderness, Superior National Forest, Minnesota
  27. Rolls of hay fill a farmer's field
  28. Upper Cascades Falls flows down a mountain in Hanging Rock State Park
  29. Sunlight filters through the leaves of an umbrella tree
  30. Crater Lake National Park, Oregon
  31. Flaming shrubs and a slender quaking aspen against a canvas of lodgepole pine
  32. A moored old red boat and its mirror reflection on still waters
  33. An alligator floats in the afternoon sun amongst lily pads
  34. Hotspring Island, British Columbia, Canada
  35. Devil'S Tower National Monument, Wyoming
  36. Near Lake Minnewanka, Banff National Park, Alberta, Canada
  37. A dump truck carrying gravel kicks up a cloud of dust
  38. A flock of ibis fly over the sunset colored marsh
  39. Close view of bark on an old growth cottonwood tree
  40. A stone bridge crosses the headwaters of the Susquehanna River, New York
  41. Banff National Park, Alberta, Canada
  42. The sun rises over an Atlantic Ocean pier
  43. Cotton grass, sedges and a red spruce forest in a bog
  44. Grand Prismatic Spring, Yellowstone National Park,Wyoming
  45. Tree in autumn foliage on a grassy hillside with moon rising over all
  46. Tiger, Qinhuangdao Zoo, Hebei Province, China
  47. A Japanese cherry tree bursts forth in blossoms
  48. Lake Louise, Banff National Park, Alberta, Canada