If you look closely, you can see tourists meandering the boardwalk at the edge of the Grand Prismatic Spring in Yellowstone National Park, in Wyoming. The image is part of a new photo exhibit and coffee table book called "Earth From Above" by Paris-born naturalist, author and photographer Yann Arthus-Bertrand.
Yann Arthus-Bertrand, Harry N. Abrams, Inc./AP Photo
Yosemite National Park, in Sierra Nevada, Calif.
Robert F. Bukaty/AP Photo
Death Valley National Park, in California.
Rita Beamish/AP Photo
Fog rises off Snake River at Grand Teton National Park in Moose, Wyo.
Michael Lewis, National Geographic/Getty Images
Rocky Mountain National Park, located near Estes Park and Grand Lake, Colo. Biologists at Rocky Mountain National Park have been studying the impact of airborne pollutants within the national park and their effect on plants, wildlife, and overall air quality. With a high number of sunny days, the park is susceptible to elevated levels of ozone and other pollutants that are generated throughout the great Denver metropolitan area and surrounding communities by industry, automobiles and other man-made sources.
Rob Stuehrk/AP Photo
Clouds swirl over North Cascades National Park in Marblemount, Wash.
Annie Griffiths Belt, National Geographic/Getty Images
Golden Gate Bridge peeks over a hillside in its national recreation area.
Rich Reid, National Geographic/Getty Images
Glacier National Park, in Northwest Montana.
Michael Melford, National Geographic/Getty Images
Glen Canyon, aka Parker, Dam with Lake Powell in the background. The recreation area covers Arizona and Utah.
William F. Campbell, Time Life Pictures/Getty Images
The entrance to Mesa Verde National Park in Cortez and Mancos, Colo.
Taylor S. Kennedy, National Geographic/Getty Images
Mount Rainier in Washington state.
Kenneth Garrett, National Geographic/Getty Images