The Exterior Containment Zone, also know as ExtCZ, is a zone in SCP: Unity. The zone is upcoming and will be added at an as of yet unannounced date.
As the Exterior Containment Zone is yet to be added, no rooms are currently in-game or announced. However, it has been announced that this zone will be surrounded by a large dome.
Note that this list may no longer be accurate. None of these SCPs are currently in-game.