Parco minerario di Floristella-Grottacalda, Valguarnera Caropepe, Enna, Sicily, Italy, Mediterranean, Europe

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

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

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

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

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

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

The remains of a Guard Shack above the Johnson Canyon Railroad Tunnel, Kaibab National Forest of Arizona, USA

Wheal Betsy winding House, a relic of mining on Dartmoor, Mary Tavy, Dartmoor National Park, Devon, England, United Kingdom, Europe