Sunsets over the largest high elevation lake in North America never disappoint. Yellowstone Lake, claiming over 140 miles of shoreline, holds ice on its surface over half of the year. It would be natural to assume that all the water is freezing cold, and it would be if it were not for the volcanic forces responsible for shaping this landscape, which are still very active today. While surface is covered in an ice layer as thick as two feet, the water beneath reaches temperatures up to 252° F (122° C)!