National Trail

It would appear that the National Theatre is hiding something. Quite what secrets it has up its sleeve, no one knows – the only way to find out is to take part in this month-long series of treasure hunts. It's an interactive adventure created by arts company metro-boulot-dodo, that will not only help to unravel the history of this beautiful modernist building, but will yield further treasures in the secret vault for those canny enough solve all the clues.