Balmoral Castle, Scotland It was Prince Albert who first began to develop the garden at Balmoral Castle, after it was bought by Queen Victoria in the 1850s. Another royal consort, the Duke of Edinburgh, has taken a keen interest in the garden here, adding a kitchen and water garden. Picture: Alamy
Windsor Castle in Windsor, Berkshire, UK (by Pierre Langlois). Windsor Castle is the oldest and largest occupied castle in the world. Ten British monarchs are buried in Windsor's St George's Chapel: Edward IV, Henry VI, Henry VIII, Charles I, George III, George IV, William IV, Edward VII, George V and George VI.