The Mendip hills stretch across the landscape south of Bristol and Bath, running from Weston-super-Mare in the west to the Frome valley in the east, with views down across the Somerset Levels. More than seventy square miles are designated as an area of outstanding natural beauty, with ancient woodland rising above dramatic gorges. Beneath their beauty, the hills hide an intriguing wartime story. Black Down was one of the "starfish sites", where fires were lit at night as decoys to simulate burning cities and so trick the German planes into dropping their bombs on the countryside instead. Its physical remains can be seen in the landscape to this day.

Helen Mark explores the area and learns about its history - both ancient and more modern. Nearby Cheddar Gorge may be more famous, but Helen finds out that Burrington Combe has a fascinating past. It's home to what is believed to be the oldest cemetery in Britain, where human bones were excavated from a cave in the 19th century. Modern radiocarbon dating techniques have shown them to be more than 10,000 years old. The area is also an important haven for wildlife. Helen meets a ranger who is busy building a hibernaculum - an underground hiding place where adders and other creatures can spend the winter.

Presented by Helen Mark and produced by Emma Campbell