Grand Canyon National Park (Colorado)
It is considered one of the 7 natural wonders of the world and has the visit of thousands of visitors a year. It was also one of the first national parks in the United States. The Grand Canyon itself is one of the largest tourist attractions in the United States and is thus considered one of the
Places you can not miss in this country. The canyon was created by the Colorado River for millions of years, its channel marked the ground to leave the structure as seen today. In addition it has a glass platform from which you can see the 2 billion years of history of the earth that have been exposed while the Colorado River undermined layer after layer of sediment. Hence the name of the attraction because the tour conveys the impression of walking through the sky.