Forest of White Dreams

The Forest of White Dreams is a forest covered by fog all year long. It is inhabited by monsters known as Prankster Imps, which are capable of disguising themselves as others.

Background
10 years ago, when the Seven Deadly Sins where framed for the murderer of the Great Holy Knight Zaratras, Diane of the Seven Deadly Sins came here, looking for a place to hide. She ordered the creatures living there, the Prankster Imps to hide her from the Holy Knights and to server her, otherwise she will go on a rampage.

The forest is really big, and even walking 3 hours in it, you still may not even find any kind of animal. Even the experience hunters avoid the forest, since it's easy to lose sense of direction

Forest of White Dreams Arc
The journey of Meliodas and Elizabeth lead them to the Forest of White Dream, where they where looking for a member of the Seven Deadly Sins. There they encountered the Prankster Imps which though they where Holy Knights and tried to stop them. But they weren't able to stop Meliodas, and even accidentally brough them to Diane. After some talking between Diane and Meliodas, Gilthunder from the Holy Knights came. He had a small fight with Meliodas, trying to kill him, but eventually was thrown away from the forest by Diane, to the near town. After that Meliodas, Diane and Elizabeth continued their journey towards Baste Dungeon, and the Prankster Imps where finally able to live in peace again.