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

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

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

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

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