Africa: Egypt - Kenya photo essay

Central America: Costa Rica

Europe: England - Paris, France

USA:

South West

• Arizona: Grand Canyon, Sunset Crater, Petrified Forest...
• Wind Cave National Park and Jewel Cave National Monument
  West
  
• Devils Tower National Monument, 2002
• Grand Teton National Park, 2002
• Pacific Northwest, 2005: Mount Saint Helens, Olympic National Park, North Cascades National Park, Glacier National Park, Mount Rainier National Park.
• Utah: Dinosaur National Monument, Great Salt Lake

Central

• Clifton Gorge State Nature Preserve, Ohio
• Forest Glen Preserve, Illinois photos
• Rocky Mountain National Park, Mesa Verde National Park
• Yellowstone National Park, 2002
• Kentucky, 2004

North East and Mid-Atlantic

• Washington DC: Native American Museum - Library of Congress
• Virginia: Bull Run, Great Falls, Shenandoah National Park - Bull Run Mountain Conservancy Trail - Mason Neck State Park
• Maryland: Monocacy Aqueduct - Rocky Gap State Park
• New York City, 2004   Central Park and the Met, 2005
• Pennsylvania: Appalachian Trail
• Delaware: Longwood Gardens

South

• South Carolina