Snow covered trees and mountain ridge with star filled night sky and Northern Lights (Aurora Borealis), Gerdi Farm, Iceland, Polar Regions

Cresent Lake, Aurora Ridge in the background, Olympic National Park, UNESCO World Heritage Site, Washington, United States of America, North America

Cresent Lake, Aurora Ridge in the background, Olympic National Park, UNESCO World Heritage Site, Washington, United States of America, North America

The image depicts the Northern Lights over mountains with a starry night sky and a serene lake in the foreground, Panorama shot, Canadian Rockies, Alberta, Canada, North America

Mountain range with Cerro Fitz Roy at sunrise reflected in Lago de Los Tres, Los Glaciares National Park, El Chaltén, Santa Cruz Province, Patagonia, Argentina, South America

Northern lights (Aurora borealis) in different colours, starry sky, snowy mountain landscape in front, Alaska, USA, North America

Summit cross of the third Watzmannkind in front of first and second Watzmannkind, sunrise, Watzmannkar, Watzmann, Berchtesgaden National Park, Berchtesgaden Alps, Schonau am Konigsee, Bavaria, Germany, Europe

Summit cross of the third Watzmannkind in front of first and second Watzmannkind, morning mood, Watzmannkar, Watzmann, Berchtesgaden National Park, Berchtesgaden Alps, Schonau am Konigsee, Bavaria, Germany, Europe

Rob Raker ascends a vertical pitch of glacial ice high on the Cassin Ridge route of Denali (Mt. McKinley), Alaska in May 1990. This pitch is the technical crux of the route which ascends the South Face to the summit at 20,320 feet, the highest point in North America. (Photo by Kevin Steele, Aurora)

A composite photo of two views of a snowy ridge lit by the Alaskan midnite sun on May 15, 1990. The ridges are on the West Butress of Denali (Mt. McKinley). (Photo by Kevin Steele, Aurora)