Mimir's Well is a mythical well from Norse mythology, located beneath one of the roots of the world tree, Yggdrasil. It is associated with wisdom and knowledge, and is said to be guarded by Mimir, a wise being. Those who drink from the well gain profound insight and understanding. In the myths, Odin, the chief of the gods, sacrifices one of his eyes to drink from Mimir's Well, seeking greater wisdom. The well is often depicted as a source of deep knowledge, emphasizing the importance of sacrifice in the pursuit of enlightenment.