- Heimdal City is a fictional location in Norse mythology. It is the home of Heimdallr, the god of light, guardian of the Bifröst (the rainbow bridge that connects Asgard, the realm of the gods, to Midgard, the realm of humans), and the watcher of the gods. Heimdal City is often described as a golden city, situated at the border between the gods and humans. It is said to be a place of great beauty and serves as a hub of communication and protection for the divine realm.