Time takes on new meanings in this mile-deep chasm - one of the natural wonders of the world. Etched into the earth's surface in the south-western United States is a 275-mile-long canyon without equal in the world. This natural wonder, known as the Grand Canyon, forms a landscape of immense size and beauty. It is without question. one GRAND canyon! But it really can be considered two canyons, one inside the other. On the sides of these canyons lie exposed millennia of the earth's history. The inner canyon is steep and narrow, cut into hard, crystal-line rocks.
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