On the way to Seward, we stopped at Portage Glacier National Monument. The photo shows Portage Lake with the Burns Glacier in the background. The blue ice in the foreground is glacial ice which is hundreds or thousands of years old and was compressed by the weight of other ice and snow. Compression changes the way it reflects light and makes it blue. Except for the blue ice, it is almost like a black-and-white photo. An hour later, when we came out of the visitor center, the blue ice had dispersed, and the photo op was gone. Portage Lake was one of the coldest spots on the trip with the temperature around 40°F and an icy wind off the lake.