I haven't posted anything from Carlsbad Caverns in a long time. Besides the long exposures and colorful lightning, another problem with photographing in caves is getting a sense of scale. In this panoramic, I got the trail and guardrail in the foreground on the bottom left. but it's still pretty hard to tell just how big the Green Room is in this picture. This particular panoramic is three stiched images with my Nikon D100.