The axis mundi (also cosmic axis, world axis, world pillar, center of the world, world tree), in certain beliefs and philosophies, is the world center, or the connection between Heaven and Earth. As the celestial pole and geographic pole, it expresses a point of connection between sky and earth where the four compass directions meet. At this point travel and correspondence is made between higher and lower realms. Communication from lower realms may ascend to higher ones and blessings from higher realms may descend to lower ones and be disseminated to all. The spot functions as the omphalos (navel), the world's point of beginning.