These wranglers double as tour guides, leading horseback rides through the surrounding arid lands, with views of the red rock mountains of nearby Sedona.

BBC: Touring the American Southwest in a cowboy��s boots

The programme, which provides a UNESCO Global Network on Water and Development Information for Arid Lands was established in 2004 to strengthen the global capacity for management of water resources in arid and semi-arid regions.

UNESCO: In Memoriam: Professor W. Mike Edmunds