In this
particular episode Iolo looks at the mineral wealth of the Principality, demonstrating how it has affected the land and the creatures who live there.
With stunning aerial photography of Ffos Y Fan, he sees how Lapwings (one of the rarest breeding birds in Wales) are thriving amongst one of the largest open-cast industrial sites in South Wales, he also visits the blast furnace at Cyfarthfa Ironworks that is now a roost for Jackdaws and shows how the abandoned railway lines including Pontsarn Viaduct are now wonderful wildlife habitats.