A ground-based station built by the native Bandi on Deneb IV as a potential base for Starfleet consideration in 2364. Its evaluation was the first mission of the Enterprise-D after launch and the site where Capt. Picard picked up the rest of his crew, including Riker, La Forge, and the Crushers.
The base becomes a moot point when it is revealed it is actually a huge but enslaved space-dwelling lifeform with shape-shifting abilities that had been forced to appear as a technological facility. After the liberation of the alien by a fellow lifeform, perhaps even its mate, the station is ordered to be rebuilt.