It is longer than Hadrian's Wall and the Antonine Wall taken together. It is over a thousand years older than the Great Wall of China as we know it today. It is of more solid construction than its ancient Chinese counterparts. It is the greatest monument of its kind between central Europe and China and it may be the longest brick, or stone, wall ever built in the ancient world. This wall is known as ‘The Great Wall of Gorgan’ or ‘the Red Snake’. An international team of archaeologists has been at work on the snakelike monument and here they report on their findings.