A view Ailsa Craig framing the flagstick on the No. 9 green of Turnberry's Ailsa Course. Ailsa Craig is a granite island rising from the waters of the Firth of Clyde 11 miles off the Ayshire coast. It looks closer, doesn't it? That gives you an idea of how large it is.
Ailsa Craig is quarried for blue hone granite, which is the rock used in the manufacture of curling stones.