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Home Arguably one of America’s most magnificent national parks is the Grand Canyon in northern Arizona. (Image credit: NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team) Arguably one of America's most magnificent national parks is the Grand Canyon in northern Arizona. (Image credit: NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team)

Arguably one of America’s most magnificent national parks is the Grand Canyon in northern Arizona. (Image credit: NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team)

Arguably one of America's most magnificent national parks is the Grand Canyon in northern Arizona. (Image credit: NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team)

Arguably one of America’s most magnificent national parks is the Grand Canyon in northern Arizona. (Image credit: NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team)

At 14,505 feet (4,421 meters) in elevation, California’s Mt. Whitney, located in the Sierra Nevada Mountains on the west side of Owens Valley, is the highest point in the contiguous United States. (Image credit: NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team)
The Advanced Thermal Emission and Reflection Radiometer (ASTER) instrument on NASA’s Terra spacecraft provided this spacebird’s-eye view of the eastern part of Grand Canyon National Park in northern Arizona in this image, acquired July 14, 2011. (Image credit: NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team)