The sacred tree associated with the Norse world tree is called Yggdrasil. This immense and central tree, often depicted as an ash tree, connects the nine realms of Norse cosmology. It symbolizes the interconnectedness of all beings and the cyclical nature of life. Yggdrasil also serves as a meeting point for gods and various other creatures, representing the universe's structure. Its roots extend into different realms, including Helheim and Asgard, illustrating the concept of accessibility across realms. The tree thus holds profound significance in understanding Norse mythology and the balance of existence.