Crateri Silvestri view, Etna, UNESCO World Heritage Site, Etna, Sicily, Italy, Mediterranean, Europe

Riserva Naturale di Punta Bianca, Palma di Montechiaro, Agrigento, Sicily, Italy

Nisyros volcano, Nisyros Island, Dodecanese Islands, Greek Islands, Greece, Europe

Tourists standing below Pia glacier, Tierra del Fuego, Chile, South America

Close up view of hyaloclastite at Brown Bluff, a tuya, sub glacial volcano, on the east side of the Antarctic Peninsula, Antarctica, Polar Regions

Abstract details of orange slot canyon wall, Antelope Canyon X, Page, Arizona, United States of America, North America

Petrified sand dunes, White Canyon State Park, Red Cliffs Desert Reserve near St. George, Utah, United States of America

The 11th switchback along the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America

People at the Viewpoint on the Harrat volcanic plateau, AlUla, Medina Province, Saudi Arabia

Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad

Djebel Saghro, on the road from Ouarzazate to Agdz, Draa-Tafilet region, Morocco

Ring of Brodgar, UNESCO, Orkney Islands, Scotland, United Kingdom

Basalt boulders and cliffs in a section of Johnson Canyon halfway between the Bainbridge Steel Dam and Stone Dam near Ash Fork Arizona in the Kaibab National Forest.

Majestic red rock spires in Kok-Moinok Canyon, Kyrgyzstan, Central Asia, Asia

Aerial of Axel Heiberg island, Nunavut, Canadian Arctic, Canada, North America

Mount Vesuvius volcano crater and red rock landscape, near Naples, Campania, Italy, Europe

Bryce Canyon amphitheater, Inspiration Point, Bryce Canyon National Park, Utah, United States of America, North America

Tourists entering natural arch while hiking Queens Garden Trail, Bryce Canyon National Park, Utah, United States of America, North America

Grand Canyon, Lipan Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Details of the rock formation at Zabriskie Point, Death Valley, California, United States of America, North America

Petrified sand dunes, White Canyon State Park, Red Cliffs Desert Reserve near St. George, Utah, United States of America

People using binoculars to see rock cut tombs in cliffs at Dadan, ancient capital of Dadan And Lihyan kingdoms, AlUla, Medina Province, Saudi Arabia

Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad

Majestic red rock spires in Kok-Moinok Canyon, Kyrgyzstan, Central Asia, Asia

Vrelo Cave near Canyon Matka, Macedonia, Europe

Igneous sill forms a rocky backdrop to Duntulm and on the beach Jurassic sedimentary rocks yield fossils & dinosaur footprints at this SSSI locality. Duntulm, North West Trotternish, Skye, Inner Hebrides, Skye, Scotland, United Kingdom, Europe

Giant rock cliff, Nuuk Icefjord, Western Greenland, Denmark, Polar Regions

Mount Vesuvius volcano crater and red rock landscape, near Naples, Campania, Italy, Europe

Natural arch, Queens Garden Trail, Bryce Canyon National Park, Utah, United States of America, North America

Cave of Elafonisos island with orange rock color painted in white, Greece

View of the Polychrome Mountains from lookout point on the park road inside Denali National Park and Preserve, Alaska, United States of America

Kok-Moinok Canyon, a clay-sand structure formed on the slopes of arid mountains cut by water streams, Kyrgyzstan, Central Asia, Asia

Majestic red rock spires in Kok-Moinok Canyon, Kyrgyzstan, Central Asia, Asia

Human shadows on the lava formation and rock forms on the island of Bartolome in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Natural rock formations at Zabriskie Point, Death Valley National Park, Eastern California, California, United States of America, North America

Examples of Tafoni created in the Warton Sandstone layer, King George River, Kimberley, Western Australia, Australia, Pacific

Remarkable rocks, source of inspiration for the artist Salvador Dali, Cap Creus, Costa Brava, Catalonia, Spain, Europe

Nisyros volcano, Nisyros Island, Dodecanese Islands, Greek Islands, Greece, Europe

A male mountaineer is standing on the summit of the Barrhorn, a mountain peak of 3610 meter in the Swiss Alps. It is one of the highest summits in Europe to be accessible to experienced hikers. The region of Wallis is home to over 40 mountain peaks higher than 4000 meter. The highest one that is completely situated within the Swiss borders is the Dom, which is visible in the background. The Mattertal runs from Visp all the way to Zermatt and is a paradise for all outdoor enthusiasts, like hikers, climbers, alpinists, walkers, mountain bikers and nature lovers.

A female hiker relaxing near a river in the Swiss Alps. The region of Wallis, close to Zermatt. In the background is the Ried glacier. This valley is a paradise for outdoor enthusiasts like climbers, alpinists, hikers, mountainbikers and nature lovers. The water is directly coming from the glacier, so very refreshing after an excercise.

A female hiker on her way to the Wannihorn, a mountain peak in the Swiss Alps, close to Zermatt. In the background is the Weisshorn range. This region of Wallis is home to over 40 of 4000 meter peaks and a paradise for outdoor enthusiasts like climbers, hikers, mountainbikers, trailrunners and nature lovers.