Yggdrasil's roots extend into three locations: Urðarbrunnr (Old Norse: “Well of Urðr”), Hvergelmir (Old Norse: “bubbling" or "boiling spring"), and Mímisbrunnr (Old Norse: “Well of Mímir"). As seen in the Poetic Edda poem, Grímnismál (Old Norse: "Sayings of Grímnir"), various creatures dwell within the World Tree, including: 