5. Royal Birkdale -- England (1965, 1969)
Many of the game's elite consider this course to be the finest of all Open rota layouts. Checking in at No. 30 in the world, Birkdale boasts towering sand hills and no blind shots. Host to nine Opens, most recently Padraig Harrington's win in 2008, it might be best known as the site of the Concession, when Jack Nicklaus conceded Tony Jacklin's two-and-a-half footer to preserve a 16-16 tie, one of the greatest acts of sportsmanship in golf history.