Coloured rock in waves formation in Upper Antelope Canyon, Slot Canyon, Page, Arizona, USA

Erosion helps form stunning formations in the red rocks of the Coloured Canyon, Sinai South, Egypt, North Africa, Africa

Erosion helps form stunning geological formations in the Coloured Canyon in the Sinai Desert, Egypt, North Africa, Africa

Detail, The Coloured Canyon, near Nuweiba, Sinai, Egypt, North Africa, Africa

Multi-coloured layers of Mereenie sandstone at King's Canyon, Northern Territory, Australia

Erosion helps form stunning formations in the rocks of the Coloured Canyon, Sinai South, Egypt, North Africa, Africa

Eroded hoodoos and rock formations in the Coal Mine Canyon, coloured by minerals, Coal Mine Mesa, Painted Desert, Hopi Reservation, Navajo Nation Reservation, Arizona, USA

View of Bryce Amphitheater from Inspiration Point, coloured rock formations, fairy chimneys, morning light, Bryce Canyon National Park, Utah, USA, North America

Green coloured rocks, discoloration caused by copper oxide, Marble Canyon, Arizona, USA

Stones coloured green by copper oxide, Marble Canyon, Arizona, USA

Gertelbachwasserfaelle water falls, Gertelbachschlucht gorge, Buehl, Buehlertal valley, Black Forest, Baden-Wuerttemberg, Germany, Europe

Eroded hoodoos and rock formations in the Coal Mine Canyon, coloured by minerals, Coal Mine Mesa, Painted Desert, Hopi Reservation, Navajo Nation Reservation, Arizona, USA

Interior of Orthodox cave church of St John the Hermit in abandoned Katholiko monastery in Avlaki gorge of Akrotiri peninsula, Chania, Crete, Greece. Shot through open window. Selective focus

Rock formation at Cathedral Valley, Capitol Reef National Park, Utah, USA

Rock shapes, colors and structures in the Antelope Slot Canyon, Arizona, USA, America

Papillon Grand Canyon Helicopters, sightseeing flights, Grand Canyon, Arizona, USA, North America

Eroded hoodoos and rock formations in the Coal Mine Canyon, coloured by minerals, Coal Mine Mesa, Painted Desert, Hopi Reservation, Navajo Nation Reservation, Arizona, USA

Rock shapes, colors and structures in the Antelope Slot Canyon, Arizona, USA, America

Rock shapes, colors and structures in the Antelope Slot Canyon, Arizona, USA, America

Rainbow, Ofaerufoss waterfall, Eldgja or Eldgja fire gorge, Skaftarhreppur, South Iceland, Iceland, Europe

Gertelbach brook, Gertelbachschlucht gorge, Buehl, Buehlertal valley, Black Forest, Baden-Wuerttemberg, Germany, Europe

Rock shapes, colors and structures in the Antelope Slot Canyon, Arizona, USA, America

Man standing in Antelope Canyon near Page, Arizona

Rock shapes, colors and structures in the Antelope Slot Canyon, Arizona, USA, America