 The gardens, in a series of garden rooms enclosed by yew hedges and open lawns, linked by carefully planned vistas, is one of only three Grade I listed gardens in Gwynedd.Plas Brondanw stands on the road to the tiny village of Croesor and the distinctive Snowdonia mountain named Cnicht, within the Snowdonia National Park.The house was built by John ap Hywel in about 1550, and another member of the family, William Williams, made various improvements in 1660.