But understand the terrain. Like these visitors at the Grand Canyon's 100-foot Havasu Falls, who were hucking from ledges 30 feet up when Bennett Barthelemy photographed them. "All it takes is one person to go higher or flip and then everyone gets psyched and goes," says the Ojai, California–based lensman. The Havasupai Indian Reservation, which controls access to the land, stipulates that climbing on the rocks is illegal. "They don't monitor the jumping," says Barthelemy, "so you have to be smart about it."
THE TOOLS: Nikon D700, 70–300mm f/4.5 lens, ISO 640, f/5.6, 1/1,250 second.