Item #: Dr. Mann's Proposal
Object Class: Embla1
Laconic Containment Procedures: Fence it off and have security guards guard it.
Laconic Description: A gravel path that, when traversed clockwise, functions regularly but goes continuously uphill when traversed counterclockwise.
The article links to the Tale Document 001-O5, in which an O5 member explains how early members of what would become the Foundation studied the path and learned how to create anomalies. Eventually, the situation gets out of hand, and SCPs they didn't make appear.
Additional Context: The situation of more SCPs inexplicably appearing offers an in-universe explanation of why the number of SCPs in the database is constantly increasing.