번역될 언어: 영어
In this audio guide we will firstly see The Wathtower building. Then we will focus on the history of each stratum to better understand the history of the canyon formation. Finally, we will see the history of the 20th century buildings that were constructed for the visitors to the park.
Data of the Grand Canyon are impressive. It has a depth of 1600 meters. His length is 350 kilometers. The Colorado River has uncovered 2000 million years of the Earth history.