England, Nottinghamshire, Ratcliffe, Ratcliffe Power Station with cloud of smoke being released from the chimneys silhouetted at dawn.

England, Nottinghamshire, Ratcliffe, Ratcliffe Power Station chimneys with rising smoke silhouetted at dawn.

Iceland, Snaefellsnes Peninsula National Park, Djupalonssandur black sand beach. Two people in silhouette sitting on the beach looking out to see.

Iceland, Snaefellsnes Peninsula National Park, Djupalonssandur black sand beach. Two people in silhouette sitting on the beach looking out to see.

Iceland, Snaefellsnes Peninsula National Park, Djupalonssandur black sand beach. Sightseeing tourists silhouetted on the skyline.

India, Narmada River, Dusk puja or prayers in Holy river. Two figures standing in river at waist height with raised arms silhouetted against sunset sky reflected in water.

Afghanistan, General, Nomadic Kuchi camel train silhouetted against pale sky. The Kuchis are nomadic herders and usually Pashtun.

England, London, One capsule on the London Eye silhouetted against the sun.

England, London, The London Eye capsules silhouetted against the sun.

Qatar, General, Oil refinery at sunset.

France, Brittany, La Roche Bernard, Silhouetted couple walking down hilly street.

India, Maharashtra, Aurangabad, Bibi-ka-Maqbara the poor man s Taj Mahal. Built 1679 as a mausoleum for Aurangzeb s wife Rabia-ud-Daurani, Exterior and silhouetted visitors framed in arch.