Robert Macfarlane sets off underground again. This time he's on the Italian-Slovenian border and will descend beneath the Karst with a guide called Sergio.
In his eagerly awaited new book, Robert Macfarlane is on his travels in various worlds beneath our feet.
On the Italian-Slovenian border he goes underground with the guide Sergio. Underneath the Karst, that is, where - "a path winds down past blocks of limestone, to a brick hut. The hut is built over the entrance to the abyss..."
Read by the author.
Producer Duncan Minshull