If you have a crippling fear of heights like TV star Nick Knowles, then the Grand Canyon with terrifying ziplines and a vertigo-inducing glass bridge it not going to be a relaxing assignment.
But as the 60-year-old presenter is also turning into a bit of an adventurer he’s likely to face this kind of hair-raising activity more often.
In his latest series for Channel 5, Nick is aiming to explore the history, ecology and ancient culture of the canyon in the US state of Arizona.
