Ardross Castle may not be available for getaways, but these stronghold hotels are the perfect place to hole up Sign up to Simon Calder’s free travel email for expert advice and money-saving discounts Get Simon Calder’s Travel email Get Simon Calder’s Travel email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice Millions of us will be glued to the final of The Traitors’ first celebrity series – and the lavish setting is as