The isles of Lewis and Harris form Britain's largest offshore island, with a rich history dating back thousands of years. Susan seeks out the home of the world-famous Harris Tweed, visiting a local weaver where she tries her hand at making some of the fabric. Then in Habost, she learns how to Step Dance - a centuries old practice that was almost lost from Scotland for ever. At Callanish, Susan visits some awe-inspiring Neolithic giants - 49 standing stones, predating Stonehenge and steeped in mystery. Nearby, she learns the secret to jewellery making that captures the texture of these ancient standing stones.