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

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

Drone aerial view of Kriaritsi project area with abandoned roads in the south of Greece, Sithonia, Chalkidiki, Greece

Dry waterfall cliffs, Johnson Canyon between Bainbridge Steel and Stone Dams near Ash Fork, Kaibab National Forest, Arizona, United States of America

Jabal Ikmah Site, world's largest concentration of well-preserved Dadanitic inscriptions, 1st millennium BCE, AlUla, Medina Province, Saudi Arabia

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

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

Aerial of beautiful rock formations around Zouar, Tibesti Mountains, Chad

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

Aerial of beautiful rock formations around Zouar, Tibesti Mountains, Chad