Caer Ibormeith is a mythical fortress in Irish mythology, often associated with dreams and the otherworld. It is described as a place of beauty and enchantment, where the boundaries between reality and the dream world blur. The name translates to "the fort of the dreams," highlighting its significance in the realm of sleep and visions. In the tales, Caer Ibormeith is linked to the goddess Étaín, who is known for her connection to love and transformation. The fortress is said to appear only at certain times, symbolizing the fleeting nature of dreams and the mysteries of the subconscious mind.