Arizona, United States of America (USA)
Destination guide
This magnificent 443km-long canyon widens to 29km in places and plunges more than 1.6km down. Yet it’s still not the deepest canyon – both Colca Canyon in Peru and Kali Gandaki Gorge in Nepal are more than twice as deep.
But the drama of the landscape and the multi-coloured geology of this extraordinary, 2-billion-year-old geological phenomenon is unsurpassed.