I always try to check behind me when I am photographing a sunset. A lot of the time there is a picture worth taking that is just as good as what was in front of you. This was taken from the Pinnacle Overlook at the Cumberland Gap National Historical Park.

Camera: Nikon D7100
Lens: Nikkor 18-55mm
Shutter Release: Nikon
Filter: CPL
ISO: 100
Aperture: f11
Exposure Time: 1/3 Sec