Llyn Gwynant is a lake on the River Glaslyn, in the Nant Gwynant Valley near the village of Bethania, being situated in Swowdonia, Wales. It is a natural lake, formed by the glacial action and has a surface of 50 ha (120 acres). A camping site can be found on the edge of the lake. Some shots of the movie "Lara Croft Tomb Raider" were filmed here. It is popular for a series of watersport, such as canoeing and kayaking.