A couple had gone hiking in Big Bend State Park (Texas -Chihuahuan Desert) and low and behold! Scenes appeared with saguaro cactus, the signature plant of the Arizonan Sonora desert.
Sounds to me like the couple got really lost, and hiked 1,000 miles from Chihuahuan to Sonora. If only they had stopped by Tucson on the way, they would have been rescued!