Deep underground in the Yorkshire Dales, Aubrey Manning uncovers the secrets of dry-stone walls.
Producer John Triffitt ; Executive producer Richard Reisz Aubrey Manning investigates Landscape Mysteries at 12 midnight
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Deep underground in the Yorkshire Dales, Aubrey Manning uncovers the secrets of dry-stone walls.
Producer John Triffitt ; Executive producer Richard Reisz Aubrey Manning investigates Landscape Mysteries at 12 midnight