It’s not just Norman invaders who built homes to impress others. An Irish-born speculator, John George Adair, made a fortune in the US and returned to build the remote, Balmoral-style idyll of Glenveagh Castle near the Derryveagh Mountains in the late 19th century. His wife designed the beautiful gardens, and a later owner, wealthy Irish-American Henry McIlhenny, not only added to the castle but invited some of Hollywood's biggest stars to come and stay, including Charlie Chaplin and Greta Garbo. The setting is breathtaking – 40,000 acres of glens, mountains and woods – and there’s even a herd of deer wandering the grounds. Get the shuttle bus in from the visitor center and soak up the glamour.