Antelope Canyon, Arizona. A woman catches a sunbeam in Antelope Canyon on the Navajo Nation in northern Arizona. These sunbeams appear throughout the year and only last for a few minutes as they trace a path across the floor of the canyon at high noon. Perhaps the most beautiful example of water sculpted stone anywhere on Earth, the Navajo sandstone walls of Antelope Canyon have taken on the swirling, undulating appearance of the flowing water which has scoured them over the ages. Bathed in warm reflected sunlight, these sensuous curves continually change their moods as the sun wheels overhead. With our limited grasp of deep time, it is difficult for us to grasp the tiny amount of geologic time required to cut this canyon no less the 190 million years which have elapsed since this sandstone made up a vast sea of shifting dunes.