May 17, 2006It's one of the most breathtaking spectacles in
the U.S.the colorful chasms of the Grand Canyon. But could this
natural wonder become a victim of its own popularity? In 2005 Grand
Canyon National Park hosted nearly 4.5 million visitorsdouble
the number that visited in 1974.
Take a tour of this stunning natural landmark, and learn about the growing threats to the canyon's rugged but delicate beauty.