The Grand Canyon formed around 10 million years ago after disturbances in the surface of the earth resulted in the land rising, allowing the Colorado River to pierce a path through the rock. The rock forming the riverbed today is over 2 billion years old. 

The Grand Canyon lies in the southern state of Arizona. The nearest city to the gorge is Las Vegas to the west, but Flagstaff – 80 miles south – offers easiest access to the main tourist area, Grand Canyon Village. 

The Colorado River, winding its way through the vast gorges shaped the Grand Canyon into the dramatic vision it is today. The rapids provide a grand challenge for the brave adventurers who tackle the river by boat, particularly the notorious Lava Falls Rapids. 

Stretching from Lake Mead through to Lake Powell the Grand Canyon extends some 227 miles. The vast chasm broadens towards the horizon at up to 18 miles at its widest point. In some places the land drops 1 mile to the winding Colorado River. The colossal gorge offers no easy route to the opposite side.

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Around th World, 2009