The significant bridge that connects the realms in Norse mythology is known as Bifröst. Bifröst is described as a rainbow bridge that links Midgard, the realm of humans, to Asgard, the realm of the gods. This bridge symbolizes the connection between the divine and mortal worlds, emphasizing themes of interconnectedness and the flow of energy between realms. In mythological narratives, Bifröst is also portrayed as a passageway for gods and beings, playing a crucial role in the cosmic order. Its existence reinforces the Norse belief in a shared universe where every realm is vital to the greater whole.