World Natural Heritage USA 3D - Grand Canyon (2013)
The Grand Canyon will forever remain unexplored and untouched. No one will ever be able to visit it. The area is inhospitable, the journey there too dangerous. This is the conclusion of a failed expedition, drawn by Joseph C. Ives in 1858. But he was wrong. Since then, more than 100 million tourists have visited the Grand Canyon of the Colorado River.