The bifrost is the archaic name for the rainbow road, the bridge of colors which exists between all potential realities. The path between the dimensional realms of existence. Also known as the rainbow bridge or the rainbow road.
In books and cinema around Norse mythology, the bifrost is the means of passage between Midgard and Asgard and the Nine Realms. In the cosmology of the Mythica, the focus is on understanding what we call ‘Midgard’ and ‘Asgard’ are states of being within the self, and that the bifrost is the passage between those states of being.