Nestled beside a loch in the Scottish Highlands is Inveraray Castle, a mid-18th century country house that brings in a staggering 130,000 visitors each year. Host Julie Montagu, Viscountess Hinchingbrooke travels to a remote corner of Scotland to see how its owners, the Duke and Duchess of Argyll, run their massive castle and sprawling 50,000-acre estate as both a business and private home. Julie attends the annual Inveraray Highland Games and has a go at the most challenging event: tossing the caber.