Unkown Threat

Item #: ██
Object Class: Safe (Keter if opened)
Special Containment Procedures: SCP-██ is currently located in Site-██, requiring level 3 clearance to access its holding chamber. A biometric lock made of extremely dense titanium is used to keep SCP-██ shut at all times, unless clearance from a level 4 researcher is given.

Description: SCP-██ is a wooden door resembling those of medieval times that is currently not attached to any backing or structure. The door itself contains no anomalous properties, and is subject to normal degradation if not properly cleaned and maintained. Anomalous properties only begin to manifest when the door is opened. A dimension previously undiscovered (now designated as SCP-██-1) appears approximately 2.7 seconds after the door is opened.

The location in SCP-██-1 in which