Thanks for your reply!Roe Valley Country Park, Limavady, Co.Londonderry and Giants Causeway, Co.Antrim, Northern Ireland. Check out the locations on IMDb - http://www.imdb.com/title/tt0829150/locations?ref_=tt_dt_dt
Tried but couldn't get near filming!
Recently I watched a new movie by Luc Besson - Lucy.