In Bryce Canyon National Park rain, wind and temperature shape these statuesque rock formations. But unlike in many other places, here at 9000 feet above the sea level flowing water only plays a minor role. As snow and ice melt, water seeps into fractures and as it re-freezes it expands and cracks the rock around it. This process is repeated endlessly over millions of years with stunning results. "Inside job" perfected, so to speak.