Antelope Canyon

A beam slanting across the canyon just before 1 p.m. in early April, entering at the top right and landing in a bright pool on the sand. The sun is not quite overhead, so the shaft leans rather than drops. Set it beside the straighter beams elsewhere in this gallery and you can see how much the angle changes with the season and the hour. A spring tour around midday can still catch a beam like this one.