Tony Waltham

The Trans Alaska Oil Pipeline running on refrigerated support to stop oil heat melting the permafrost, Alaska, United States of America, North America

Late winter hikers on snowfield in South Crater on Tongariro Crossing, Tongariro National Park, UNESCO World Heritage Site, South Auckland, North Island, New Zealand, Pacific

Trans Alaska oil pipeline across taiga through Alaskan Range carried on insulated ground piles, Alaska, USA

Deer Cave with show cave path, largest cave passage in the world, Gunung Mulu National Park, Sarawak, island of Borneo, Malaysia

Oil pumps (nodding donkeys) for sale at oilfield supply merchants, Shelby, Montana, United States of America, North America

St. Catherine's Monastery, UNESCO World Heritage Site, with shoulder of Mount Sinai behind, Sinai Peninsula Desert, Egypt, North Africa, Africa