Logan stones bathed in first light of a winter morning, Belstone Tor, Dartmoor National Park, Devon, England, United Kingdom, Europe

Colourful sunset over a granite logan stone on Belstone Tor, Dartmoor, Devon, England, United Kingdom, Europe

The jungle hides the ancient ruins of Ta Prohm in the Angkor National Park, Angkor, UNESCO World Heritage Site, Siem Reap, Cambodia, Indochina, Southeast, Asia, Asia

Church of the Good Shepherd, an old church overlooking turquoise blue Lake Tekapo, Tekapo, Mackenzie Distrtict, Canterbury Region, South Island, New Zealand, Pacific

Logan Rock, Porthcurno, Cornwall, England, UK, Europe

Porthcurno Beach, Pedn Vounder Beach, Logan Rock, South Coast, Cornwall, England, United Kingdom, Europe

Men work at a limestone quarry, near Matanzas, Cuba.

Men work at a limestone cooperative quarry, just outside the city of Matanzas, Cuba. The stone is cut with long-toothed handsaws, and carried through the quarry to a waiting truck.

Men work at a limestone quarry, near Matanzas, Cuba.