Llyn Barfog is a small lake in Snowdonia occupying high ground above the northern banks of the River Dyfi. Covered by yellow water lilies in the summer and surrounded by rushes that give it a bearded appearance. However, Celtic Folklore suggests a different derivation for the name: it has been suggested that the lake was originally called Llyn y Barfog or The Bearded One’s Lake. The Bearded One was some ancient mythical being who lived there. The lake is also linked to King Arthur, a monster, and elves.