We visited the spectacular and large Stone Circles at Callanish on the Isle of Lewis. An arrangement of standing stones placed in a cruciform pattern with a central stone circle. They were erected in the late Neolithic era, and were a focus for ritual activity during the Bronze Age. The mill, which was still used as recently as the 1930&#039;s, and much of the workings are set in a chamber below floor level. Water from the nearby burn was led into a mill lade some way upstream from the mill. It was then channelled to the top of a mill race just behind the mill itself. From here a steep chute directed it down onto one side of a circular set of paddles, set horizontally in a chamber directly beneath the mill. 