Grand Canyon is one of 58 national parks in the United States, and is located in the US state of Arizona …
This is the deepest and largest canyon in the world. It is located in northwestern Arizona. Much of the canyon make the stepped wall, over which flowed the Colorado river, which is now in a much lower level of the canyon.
It is 446 kilometers long, 29 kilometers wide and deep over 1500 meters. It is composed of rocks with sharp cliffs, many valleys and deep gorges. This expanse was declared as a national park, which is visited by 4 million tourists a year.
It was discovered by the spanish expedition, back in 1540. However, due to the very inaccessible terrain, at that time it wan’t possible to fully explore the canyon. It took more than three centuries to available technology created opportunities for more detailed study.