Causeway to stand in America Giant`s Causeway is to stand at Ashford Stud in Kentucky after a successful first season at the American stud`s sister operation, Coolmore, in Ireland.The `Iron Horse`, trained by Aidan O`Brien at Ballydoyle, won six Group One races as a three-year-old, including five in a row.He then ended his racing career with a battling neck second to Tiznow in the Breeders` Cup Classic at Churchill Downs in November.The son of Storm Cat earned a large number of admirers in America whose breeders sent him 41 mares in his first season and all have been reported in foal.