Evaporation of sea water in salt pans, Museo de la Sal (Salt Museum), Las Salinas del Carmen, Fuerteventura, Canary Islands, Spain, Atlantic, Europe

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

Towanroath Engine House (Wheale Coates), UNESCO World Heritage Site, on the clifftops near St. Agnes, Cornwall, England, United Kingdom, Europe

High angle view of Maras salt marsh terraces, Salinas de Maras, Cuzco Region, Peru, South America

Remnants of the Richinbar Mine within the Agua Fria National Monument, Black Canyon City, Arizona, USA

The Combined Treatment Plant (CTP) run by the De Beers company to re-process diamond mine tailings in Kimberley South Africa. It was opened on 2 August 2004.

Corta Atalaya open pit mine, copper mine, Rio Tinto, Minas de Rio Tinto, Andalusia, Spain

Aerial view of open pit mining, copper mine, Rio Tinto, Minas de Rio Tinto, Andalusia, Spain, Europe

Aerial view of open pit mining, copper mine, Rio Tinto, Minas de Rio Tinto, Andalusia, Spain

Aerial view of Corta Atalaya open pit mine, copper mine, Rio Tinto, Minas de Rio Tinto, Andalusia, Spain

Soda extraction at Lake Natron, donkeys of the Maasai transport the salt slabs to the lake shore, Tanzania, Africa