Into the Grand Canyon with Nick Knowles

Part one of two. The presenter adventures through the perilous Grand Canyon, zip-lining over it and battling vertigo to examine the mile-deep chasm from every vantage point. Nick exchanges gifts with the Hualapai tribe whose ancestors used to roam the Canyon, explores the caves 21 storeys below the surface, and takes part in a project to restore the region's endangered condor population

Sunday, 19 July 2 airings

13:35