Security members patrol at the world heritage site of Stonehenge in Wiltshire, Britain on June 20, 2020. A circle of prehistoric deep shafts have been discovered near the world heritage site of Stonehenge. (Photo by Tim Ireland/Xinhua)

Photo taken on June 20, 2020 shows a sunset and security members patrolling at the world heritage site of Stonehenge, in Wiltshire, Britain. A circle of prehistoric deep shafts have been discovered near the world heritage site of Stonehenge. (Photo by Tim Ireland/Xinhua)

Security members patrol at the world heritage site of Stonehenge in Wiltshire, Britain on June 20, 2020. A circle of prehistoric deep shafts have been discovered near the world heritage site of Stonehenge. (Photo by Tim Ireland/Xinhua)