Secret Britain - Season 1 Episode 3 True North

Matt Baker and Julia Bradbury are on the road north on the third leg of their epic adventure to unlock Secret Britain. Even here, in the best loved areas of the Peaks and Lakes, there are still hidden corners of the countryside just waiting to be discovered. Julia takes a trip into the stunning underground limestone world beneath Yorkshire, while Matt relives childhood memories as he explores a secret ancient woodland on the Durham coast.