Oileán Glas, Fásach Bán

Part one of two. Eoin Warner treks the Burren's secret paths and green roads

Part one of two. Naturalist Eoin Warner embarks on a extraordinary journey through one of Ireland's most stunning and mysterious regions. He treks the Burren's secret paths and green roads, spending a year seeking out its wild creatures and hidden treasure, following the adventures of a pine marten family, finds kestrels making a home in an ancient abbey, rare bats roosting in castle chimneys before he swims offshore to witness one of the greatest shark gatherings in the world