Nant Gwynant is a valley in northern Wales. The A498 road descends 600 feet into the valley in about two miles from Pen-y-Gwryd; it follows the Nant Cynnyd, the Afon Glaslyn and alongside Llyn Gwynant, then beside the Nant Gwynant river to Llyn Dinas and passing below Dinas Emrys to Beddgelert. From Wikipedia
