You're about to enter in the Backrooms.
These places form the framework of the Backrooms, and vary greatly in size, danger, and inhabitability.
Typical levels tend to be infinite in size and often provoke a feeling of uncanny familiarity to those happening upon them. The laws of physics and nature as we know them cannot be relied on in the depths of the Backrooms; nevertheless, some of the more hospitable and stable levels are home to thriving communities, and some inhabitants have managed to survive in even the most dangerous levels.