The NightWing Tunnels, also referred to as portals in the series, were created by the NightWing animus Stonemover, and were used by the NightWings to make traveling to and from their island and to other locations easier. There are currently two known portals, both with one side in the Rainforest Kingdom. One leads to the NightWing's destroyed island, and the other leads to the Kingdom of Sand. There may be more, but they have not been specified.