- "You'll have plenty of light, if it is a Coway passage. Take my word for it, boy."
Coway shafts were underground tunnels used by the Coway to travel beneath the surface of Mimban. They were well-lit with phosphorescent growths. The Coway would often connect these tunnels to existing Thrella wells for surface access. They did not bother to hide their egresses to the surface. The Coway shafts could be quite extensive, including underground rivers and lakes, and large chambers that could house entire tribes of Coway numbering in the hundreds.
Princess Leia Organa, Luke Skywalker, and their companions Halla, Hin, and Kee found themselves in a Coway shaft at the mercy of a local Coway tribe while attempting to discover the Kaiburr crystal in 2 ABY. They later assisted the tribe in fighting off an invasion of their Coway shaft by Imperial Stormtroopers led by Darth Vader
- Splinter of the Mind's Eye (First appearance)
- Splinter of the Mind's Eye 3
- Splinter of the Mind's Eye 4