Craigh na Dun, the stone circle where Claire travels through time, is fictional. These scenes were filmed near Perth at Kinloch Rannoch. The stones are painted styrofoam. The filming location had specific requirements for size, look, and view, making it easier to create the stone circle. The stones were likely inspired by the Callanish Stones on the Isle of Lewis, however. There is a stone circle called Clava Cairns near Inverness near the Culloden battlefield.