Outdoor enthusiasts are being advised to bring their walking footwear in preparation for a visit to the Ryedale Windypits.

The limestone fissure caves located on the southern edge of the North York Moors have been labelled a Site of Special Scientific Interest, as they are the home of several bat species and have been used by humans for thousands of years.

Archaeological deposits and human bones have been found dating from 4,500 years ago up until Roman times and the caves are set to be further examined in a new BBC series to air on June 30th.

Graham Lee, senior archaeological conservation officer for the National Park Authority, said to the programme makers: "Little is known about the origins of the skeletons found in the windypits and how they came to be there."

While access to the Windypits remains restricted in some areas, trained, curious visitors can take a peek inside at this mysterious cave structure to learn more about UK natural and human history.