Sources:
- http://grantandbrooke.blogspot.com/2010/06/ireland-road-trip-part-7-of-8-causeway.html
- http://withersprimary.blogspot.com/2010/06/giants-causeway.html
- http://manolisphotography.blogspot.com/2010/05/across-dividenorthern-ireland.html
- http://lynvingen-photos.blogspot.com/2010/08/giants-causeway.html
