Aurora borealis over mountains within Denali National Park on a very cold winter night. The Andromeda Galaxy is visible to the left; Alaska, United States of America PacificStock
A hiker exits a small ice cave while exploring the terminal moraine of Black Rapids Glacier in the winter; Alaska, United States of America PacificStock
A man walks out the entrance of an ice tunnel at the terminus of Canwell Glacier in the Alaska Range in mid-winter; Alaska, United States of America PacificStock
Rays of sunlight through trees illuminate ice fog on a very cold day; Fairbanks, Alaska, United States of America PacificStock
A man is framed by the entrance to a large ice cave near the terminus of Augustana Glacier in the Alaska Range in winter; Alaska, United States of America PacificStock
Aurora borealis swirls over mountains within Denali National Park on a very cold winter night; Alaska, United States of America PacificStock
Aurora borealis stretches over mountains within Denali National Park on a very cold winter night; Alaska, United States of America PacificStock