No-End House

The No-End House, also designated as SCP-630-S, is a haunted house that has numerous rooms, some of which contain unspeakable horrors, and others that can lead to different realms, including the Ark.

Description
The exterior of the No-End House appears to be a standard haunted Victorian house about three stories tall and built out of wood with dark coloration. The house contains a countless number of rooms despite its misleading exterior, though most individuals can access from six to ten rooms at each visit. Each room's interior differs from one another, and some doors are implied to be portals leading to different alternate or parallel realms or realities, with one such door acting as a doorway to the Ark.

The house's location changes every so often, and can appear at a location miles away from its previous location, sometimes even in another country. Because of this, the SCP Foundation has had difficulty trying to contain the anomalous house.

History
In 2017, after HABIT interfered the Operator's abduction of Toby Rogers and Skye Martin, he informed Eyeless Jack he was holding the two hostage in his realm, implied to be the Ark. Joel Gilliam revealed the SCP Foundation has been tracking the No-End House's location and allowed Jack and Jeff the Killer to use the House to quickly find a portal to the Ark.

Trivia

 * The No-End House is based on the creepypasta of the same name, though the concept used in the Averno series is mostly based on the House featured in the second season of horror anthology series Channel Zero, which is also based on the original creepypasta.