Desert turns to pine covered plateaus, as the earth opens up to reveal one of the world's natural wonders, the Grand Canyon. This incredible spectacle is difficult to comprehend, especially through the eyes of a child, so whether you decide to hike along the rim or take the more adventurous route into the canyon itself, you'll be amazed at the sheer beauty of the place. Carved over several millennia, this massive wonder of nature is 277 miles (445 kilometres) long, up to 18 miles (29 kilometres) wide and over a mile deep (1.6 kilometres). Snaking through the canyon floor is the mighty Colorado River, which runs 1450 miles (2330 kilometres) through seven American states and two Mexican states.