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

Humberstone Saltpeter Works, UNESCO World Heritage Site, northern Atacama, Chile, South America

Sewell Mining Town, UNESCO World Heritage Site, Chile, South America

Humberstone Saltpeter Works, UNESCO World Heritage Site, northern Atacama, Chile, South America

Humberstone Saltpeter Works, UNESCO World Heritage Site, northern Atacama, Chile, South America

Sewell Mining Town, UNESCO World Heritage Site, Chile, South America

Humberstone Saltpeter Works, UNESCO World Heritage Site, northern Atacama, Chile, South America

Cromford Mill, Matlock, Peak District National Park, Derbyshire, England, United Kingdom, Europe

Macclesfield Parish church blackened by industrial pollution during the industrial revolution, Cheshire, England, United Kingdom, Europe

Durango-Silverton Narrow Gauge Railroad at Silverton station, La Plata County, Colorado, USA, North America, America

Durango-Silverton Narrow Gauge Railroad, La Plata County, Colorado, USA, North America, America

Durango-Silverton Narrow Gauge Railroad, La Plata County, Colorado, USA, North America, America

Durango-Silverton Narrow Gauge Railroad, La Plata County, Colorado, USA, North America, America

Durango-Silverton Narrow Gauge Railroad and Animas river, La Plata County, Colorado, USA, North America, America

Durango-Silverton Narrow Gauge Railroad, La Plata County, Colorado, USA, North America, America

Train conductor, Durango-Silverton Narrow Gauge Railroad, La Plata County, Colorado, USA, North America, America

Durango-Silverton Narrow Gauge Railroad, La Plata County, Colorado, USA, North America, America

Durango-Silverton Narrow Gauge Railroad and Animas river, La Plata County, Colorado, USA, North America, America