A vast Nyrian vessel containing dozens of artificial environments in which displaced peoples are held as comfortable prisoners, where the Voyager crew is confined after the Nyrians take their ship in Displaced.
The Nyrian habitat is an enormous starship divided into 94 self-contained environments, each tailored to a different captive species. It appears in the Voyager episode Displaced, set in 2373.
The Nyrians conquer without battles. Using a long-range translocator, they swap places with members of a target crew one at a time, a few minutes apart, each claiming to be a confused victim, until the ship is theirs. Voyager's crew find themselves in an Earth-like habitat with every comfort provided and no way out. A Talaxian named Jarlath has been held in the neighbouring environment for years.
The crew find the access portals between habitats, and Torres and Paris flee through a frozen one. Janeway and Tuvok seize the translocator and send the Nyrian leaders, who cannot bear cold, into that environment until they surrender and release every prisoner.