I've taken hundreds of sunset photos over the years but I can never seem to pass one by. Today's theme was natural treasure and the winter sunset seemed to fit the bill perfectly. We have had a number of really nice sunsets recently and this mother nature's intent. During the winter months the sun is at a much lower angle in the sky and farther away from the earth so it's light travels through more atmosphere. This tends to filter the higher frequency blue spectrum light leaving more of the lower frequency red spectrum light to light up the evening sky. Canon 5D Mark II, 1/5 sec @ f/2.8, ISO 800.