Scattered across the English landscape are hundreds of prehistoric monuments, spanning almost four millennia. But can you tell a henge from a hillfort? What was a stone circle used for? And what's the difference between a long barrow and a round barrow? https://eht.social/2slCa8a | English Heritage

From the ancient ruins of Machu Picchu to the lost city of Petra, National Geographic Explorer Albert Lin combines hi-tech archaeology and 3D scans to uncover the greatest archaeological finds in the most extraordinary sites of antiquity. Join him on his journey of discovery in Buried Secrets with Albert Lin, starts this Sunday at 7pm on National Geographic UK. | National Geographic UK