After making his way through the cold waters of Loch Arnish, Chris Murray finds exactly what he is looking for. On this lake on Lewis off the west coast of Scotland, the diver is examining a mysterious man-made island known as a crannog. And, incredibly, the secrets that Murray discovers deep below the water’s surface will change everything that experts know about these strange, prehistoric landmasses.
These crannogs – which can be wholly or partially man-made – are found in lochs, rivers and estuaries. And for many years, it’s been believed that these mysterious entities date back to the Iron Age – so, about 2,800 years from the present day. This school of thought claims that ancient people constructed the crannogs with either stone, timber or a combination of the two. Humans are then thought to have erected buildings on the artificial islands – again using wood or stone.