When traveling with your camera, it often helps to know the phase of the moon. That said, if you’re not a walking moon phase calendar, simply paying attention to your surroundings can be a good fallback. Such was the case for me one night before I took this photo when I happened to look out the windows of the Google office and see an almost full moon rising over downtown. I immediately opened PhotoPills, saw that the full moon was the next night, and began formulating a plan.