This documentary explores the delicate balance between preservation and prosperity in Eryri (Snowdonia). Each year, the region’s beauty spots face intense seasonal erosion as visitor numbers grow and traffic increases, placing mounting pressure on the natural environment. While tourism brings vital income to local communities, it also creates a growing dependence on a seasonal economy. Many areas fall quiet in the colder months, with once vibrant villages becoming winter ghost towns. Eryri: A Fragile Giant examines the human and environmental cost of this changing landscape.