Sand spirals

Grape vines growing in black volcanic soil in protected enclosed pits, La Geria, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Old gold mine buildings, Rodalquilar, Cabo de Gata natural park, Almeria, Spain, Europe

Ancient theatre at the Asclepieion of Epidaurus, UNESCO, Peloponnese, Greece

Aerial view of a work of land art in the middle of red sandstone formation, in the area of AlUla, Medina Province, Saudi Arabia

Circular Spadefish/Batfish (Platax orbicularis) Shoal. Barracuda Point, Sipadan Island, Borneo, Malaysia (RR)

Circular Spadefish/Batfish (Platax orbicularis) Shoal. Barracuda Point, Sipadan Island, Borneo, Malaysia. (RR)

Aerial shot, allotment site, Witten, Ruhr district, North Rhine-Westphalia, Germany, Europe

Aerial shot, night scene, Oberrahmede, Luedenscheid, North Rhine-Westphalia, Germany, Europe

Aerial shot, night scene, Oberrahmede, Luedenscheid, North Rhine-Westphalia, Germany, Europe

Circular staircase, Sprinkenhof building, Hamburg, Germany, 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 bright sunburst 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

Hawaii, Day Octopus (Octopus cyanea), View of curling legs from underside, clear blue ocean water.

Hawaii, Day Octopus (Octopus cyanea), View of curling legs from underside (Black and white photograph).

Arizona, Near Page, Landscape of Horseshoe Bend and Colorado River.

Oregon, Crater Lake National Park, Snowy Crater Lake and Wizard Island.

Oregon, Crater Lake National Park, Snowy Crater Lake and Wizard Island.