Rocky coastline and inaccessible beach near Punt de Moras on the north coast, Rias Altas in Galicia, Spain, Europe

Children smeared with mud, mud bath in the Sterntaler Filze, moorland, peat fields in Bad Feilnbach, Upper Bavaria, Bavaria, Germany, Europe

Men's muddy feet, barefoot park, Germany

Children smeared with mud, mud bath in the Sterntaler Filze, moorland, peat fields in Bad Feilnbach, Upper Bavaria, Bavaria, Germany, Europe

Four-wheel drive car driving through mud and water, Moremi National Park, Moremi Wildlife Reserve, Okavango Delta, Botswana, Africa

African elephant (Loxodonta africana) splashing mud at a waterhole, animal portrait, Nxai Pan National Park, Ngamiland, Botswana, Africa

Truck stuck in the mud, jungle trail, Bamenda, Cameroon, Africa

Jeep driving through the Mai Chau Valley, Vietnam, Asia

Truck being towed out of the mud by another truck, jungle trail, Bamenda, Cameroon, Africa

Mopeds in Mai Chau Valley, Vietnam, Asia

Load from a truck stuck in the mud, jungle trail, Bamenda, Cameroon, Africa