Huelgoat (Breton: An Uhelgoad) is a small town in Brittany, France. It is also the name of the forest that surrounds the town. The forest is a large forest with many birch trees and owls. There are also some remarkable large boulders, waterfalls and caves. It is believed that King Arthur hid his treasure in the forest. There is also a place called Grotte de Diablo, or Cave of the Devil. You can go down a metal ladder and there is an underground stream and crashing waterfall.