rating: 0+x

Item #: SCP-XXXX

Object Class: Euclid

Special Containment Procedures: Due to SCP-XXXX's immobile nature, it is contained at the location of discovery. Provisional Site-██ has been constructed around the anomaly, located twenty (20) km North of ██████, Maine under the guise of a privately owned fallout shelter. A Foundation presence is to be maintained at the site at all times to deter unwanted civilian intrusion.

Antique shops, auction houses, and similar establishments in ██████ and adjacent towns are to be monitored for the presence of artifacts determined to have originated from SCP-XXXX-3 as well as awareness of SCP-XXXX. Artifacts discovered are to be purchased and delivered to Provisional Site-██ for storage.

Measurements of SCP-XXXX-1's downward expansion are to be taken every 24 hours. Any growth deviating from the expected 2.74mm daily is to be reported. Exploration of SCP-XXXX-3 chambers is permitted, and manned exploration is to be carried out by Class D personnel. Exploration of SCP-XXXX-4 is not permitted at this time. See addendum for details.

Investigation into the identity of POI-XXXX-1 is ongoing and considered a high priority.

Description: SCP-XXXX is a massive underground structure accessed via a two meter wide wide opening in the floor of an abandoned concrete structure built into a small hill located twenty kilometers North of ██████, Maine. The non-anomalous structure holding SCP-XXXX is a square concrete bunker with a small corridor and airtight door connecting the chamber with the outside environment. No furnishings, utilities, or objects save for SCP-XXXX were present upon discovery. Provisional Site-██ has been established inside of this bunker.

SCP-XXXX was discovered on March 1, 2003 as part of an unrelated investigation. A small portion of the local populace was aware of the anomaly at the time of discovery, and a smaller portion had taken non-anomalous objects from the anomaly. Media suppressed and amnestics distributed as necessary. Efforts to reclaim missing artifacts are ongoing.

SCP-XXXX-1 designates the main elevator shaft within SCP-XXXX. The depth of SCP-XXXX-1, estimated to be 13.8 million km, indicates abnormal topology. Proposals to drill through the side to confirm the nature of the topological anomaly have not been approved at this time. SCP-XXXX-1 is built entirely out of typical Maine bedrock1, and forms a singular vertical tunnel.

SCP-XXXX-1 expands downward at a constant rate of 2.74mm daily, carrying SCP-XXXX-3 instances with them. The mechanisms behind this expansion are unknown.

SCP-XXXX-2 is an elevator, presumably pulley operated, used for travel within SCP-XXXX-1. SCP-XXXX-2 and its components exhibit extraordinary durability, showing no signs of wear after continued use. In addition, the cable extends into holes the ceiling of the concrete structure, and the pulleys themselves have not been located. Furthermore, An investigation of SCP-XXXX-2 is planned at a later date.

The speed of SCP-XXXX-2 varies with destination, with standard elevator speeds being observed for upper destinations, and speeds in excess of 300 km/s2 have been recorded for transportation to the lower destinations. Notably, no friction related heat or significant change in air currents is created by SCP-XXXX-2 during this process, and occupants of SCP-XXXX-2 are unharmed and describe travel as uneventful. A number pad within SCP-XXXX-2 is used to specify destinations for transport. The number specified by the user corresponds to an equal number of meters of depth in SCP-XXXX-1. If an invalid chamber depth is entered, the elevator immediately travels to the closest chamber to the depth imputed. No call buttons are present in SCP-XXXX-3 instances, but one is present in the surface chamber. Otherwise, SCP-XXXX-2 can only be controlled from within.

SCP-XXXX-2 was not present at the surface at the time of discovery; when called, it only arrived at the surface approximately 56 hours later.

SCP-XXXX-3 consists of an estimated eight hundred thousand irregularly spaced chambers located within SCP-XXXX-1, accessed via SCP-XXXX-2. Most chambers are styled similarly to mundane museum exhibits. Museum exhibit themed chambers are similar in appearance, with beige painted walls and oak floors. The depth of each chamber is directly related to the time period covered, with each meter in depth corresponding to one year before the present day. Chambers which cover longer time periods are located in the center of the depth range corresponding to their respective time period. Unlike a typical museum, only minimal security measures are present, usually in the form of glass cases around sensitive materials.

Historical topics covered by SCP-XXXX-3 align to a mainstream historical perspective, and do not reflect any anomalous activity whatsoever. No new historical, scientific, or other knowledge has been discovered through examination of the object. Because of the sheer quantity of SCP-XXXX-3 instances, the vast majority, especially those covering spans of time prior to human civilization, are small in size and mostly empty, save for a single plaque or display case or similar museum item.

Several chambers discovered diverge from typical SCP-XXXX-3 instances and act as administrative or utility chambers of varying nature. See log below for notable instances of SCP-XXXX-3. Exploration is by no means exhaustive, and many chambers have been skipped.

Addendum: Examination of the bottom of SCP-XXXX-1 during the removal of the objects within revealed a metal hatch built into the bottom panel of the structure, the contents of which are now designated SCP-XXXX-4. See exploration log below for details.

Addendum II: Upon a subsequent attempt at exploration, the entrance to SCP-XXXX-4 was unable to be opened. Examination revealed that the hatch had been welded shut from the opposite side.

Exploration was halted, and D-4294 was considered lost. Provisional Site-██ in the event of an unexpected transmission. Three weeks after the first exploration of SCP-XXXX-4, a transmission from D-4294's camera was received. Contents have been recorded below.

Two days after this transmission was received, a handwritten paper note of indeterminate origin was found taped to the inside of the front door of Provisional Site-██. Security camera footage shows the note instantaneously appearing; the messenger has been designated POI-XXXX-006, and nothing is known about them other than what appeared in the message. Contents recorded below.

The accuracy of the information in the note has not been verified. No plans have been made to exterminate the entities within SCP-XXXX-4. A possible update to the containment procedures is pending a decision by senior staff stationed at SCP-XXXX.