View of lakes Grey, Pehoe, Nordenskjold and Sarmiento, from Ferrier Vista Point, Torres del Paine, Patagonia, Chile, South America

Landscape view, twilight glow and mountain ridges of High Country from Mount Feathertop, Alpine National Park, High Country, Victoria, Australia, Pacific

The Drus, a famous rock wall on the Mont blanc range. The pale grey area of rock upper rightis new rock revealed by a recent, massive rock fall.

Helvellyn from Red Screes in the Lake District, Cumbria, UK, with valley cloud caused by a temperature inversion.

Great Gable from Red Screes in the Lake District, Cumbria, UK, with valley cloud caused by a temperature inversion.

View from Sligachan of rain over the Cuillin Ridge on the Isle of Skye, Scotland, United Kingdom, Europe

View from Sligachan of rain over the Cuillin Ridge on the Isle of Skye, Scotland, United Kingdom, Europe

Andalucian campagna near Montellano, Spain, at dawn

The peak of Foinaven in Sutherland, Scotland, United Kingdom, Europe

Andalucian campagna near Montellano, Spain, at dawn

The peak of Foinaven in Sutherland, Scotland, United Kingdom, Europe

The peak of Foinaven in Sutherland, Scotland, United Kingdom, Europe

A walker on the peak of Foinaven in Sutherland, Scotland, United Kingdom, Europe

A walker on the peak of Foinaven in Sutherland, Scotland, United Kingdom, Europe

The peak of Foinaven in Sutherland, Scotland, United Kingdom, Europe

A walker on the peak of Foinaven in Sutherland, Scotland, United Kingdom, Europe

A walker on the peak of Foinaven in Sutherland, Scotland, United Kingdom, Europe

Dusk, sunset, sun as star, Tejeda, village, white houses, red roofs, Massif Central, Roque Bentayga, mountain landscape, blue sky, orange clouds, grey clouds, Gran Canaria, Canary Islands, Spain, Europe

Water reflection, mountains Klifatindur, Eystrahorn and Kambhorn, Stokksnes headland, Klifatindur mountain range, Eastern Region, Iceland, Europe

Hiking trail through Snow Canyon, with circles of stones in a meeting area behind the Red Mountain Spa, with meditation maze and Snow Canyon Mountain Range in the background. Red Cliffs Desert Reserve around St George Town with rock cliffs and dark clouds in a blue sky, St George, Utah, United States of America

Hiking trail through Snow Canyon, with circles of stones in a meeting area behind the Red Mountain Spa, with meditation maze and Snow Canyon Mountain Range in the background. Red Cliffs Desert Reserve around St George Town with rock cliffs and dark clouds in a blue sky, St George, Utah, United States of America

Flames leap high as a wildfire caused by lightning spreads into the night along a ridge line, Malad River, Idaho, United States of America

Lenticular Clouds Form Over The Grey Ridge And The Wheaton River, Yukon, Canada

Hazy view of the steep, silhouetted mountain cliffs of the Napali Coast along the Kalalau Trail on the Hawaiian Island of Kauai against the blue waters of the Pacific Ocean, Kauai, Hawaii, United States of America

The mountains of Kluane National Park and Reserve seen from an aerial perspective, Haines Junction, Yukon, Canada

Memorial to first Pennsylvania cavalry on cemetery ridge

Memorial to first Pennsylvania cavalry on cemetery ridge