Just because Diana Gabaldon apparently hadnt been to Scotland when she wrote Outlander, doesnt mean that Craigh na Dun doesnt exist! Inverness, also menitoned in the books, exists does it not?!!!! I lived near Inverness for a year and never heard of the stones as mentioned in her books, but have been to Clava Cairns etc etc.
Something is not right. This message is just to keep things from messing up down the road