Himinborg is a circular city on the Ysgard end of the rainbow bridge Bifrost, home of the guardian power Heimdall. It lies in the center of the Plain of Ida, outside the gates of Asgard. It’s a gate-town of sorts, as everyone must pass through Himinborg on the way to and from the Material Plane, if they have business in Asgard. As a gate-town on the Plane of Valor, it has a large resident population of mercenaries looking for a cause and some coin.
Himinborg’s walls are manned by einheriar, and outside the gates the Doksmid dwarves sell metalwork to travellers. Nearby is the celestial stronghold Vundvellir.