Marayna's space station was a space station hidden in an inversion nebula in the Delta Quadrant.
Built by member's of Marayna's species, it was occupied by a single volunteer whose primary role was to prevent the plasma fires in the nebula from chain-reacting with a dampening field. On the world left behind, the occupant's species' enjoyed the beauty of the nebula.
In 2373, the station was operated was Marayna, when she encountered the USS Voyager traversing nearby space. The station was later boarded by Tuvok during his face-to-face encounter with her. (VOY: "Alter Ego")
The station's exterior was not seen in the episode.
According to Star Trek: Star Charts (p. 87), the Voyager made contact with this station on stardate 50460.