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Item #: SCP-2497 Level 3/2497
Object Class: Euclid Classified


Aerial photograph of SCP-2497.

Special Containment Procedures: SCP-2497 is closed from public access and has been concealed as an ecological reserve following Operation-24971A (Desalination). All public data pertaining to SCP-2497 must be screened perpetually for sensitive information. A minimum of fifteen armed Foundation personnel disguised as members of the "Polizia di Stato" must be present on-site. Trespassing civilians are to be detained and administered Class-C Amnestics. Any hostile force regardless of affiliation are to be terminated.

Description: SCP-2497, also known as "Pozzo del Merro", is a deep, anomalous sinkhole situated in Rome, Italy. Prior to Operation-24971A, many local legends surrounded the sinkhole. One notable story detailed a child who drowned in SCP-2497 and had his corpse later discovered in the ocean. These legends may be attributed to the unusual saline water found within SCP-2497, which was discovered during a brief scientific study (see Incident 1A) that alerted The Foundation to SCP-2497's existence.

At ground level, SCP-2497 appears to be a large, but otherwise unremarkable sinkhole. However, initial civilian research of SCP-2497 found it to be unusually deep. Autonomous underwater vehicles were known to have reached a maximum depth of -392 meters within SCP-2497 before Foundation personnel took over. Subsequent Foundation testing of SCP-2497 has revealed the true extent of its depth and topography.

Topographic Overview: SCP-2497 begins as a small, circular lake with a surface area of approximately 160 square meters. SCP-2497 continues vertically down to -390 meters in a roughly vertical fashion. At -50 meters and -150 meters, two short, diverging paths can be found.

At approximately -390 meters, SCP-2497 makes an abrupt turn. SCP-2497 then continues as a thin, horizontal shaft. Roughly 100 meters in, the shaft begins to noticeably widen. By the 120 meter mark, faint, seismic activity can be detected. Slight, periodic pressure differences within the water suggest that this activity is caused by motion emanating from deeper within SCP-2497.

Approximately 200 meters into the shaft, SCP-2497 opens to a large spherical cavity, with an approximate diameter of 50 meters. This cavity, now classified as Cavity-1 (C-1), houses a unique ecosystem. After this discovery, the horizontal shaft leading up to C-1 was widened to allow larger research vessels to enter. Subsequent findings show that all fauna and flora located within C-1 have extremely unique genetic material that matches that of no known species past 50%. This suggests that all life located in C-1 has been isolated from external influences, and independently evolving for at least ten million years. Further studies show that all primary producers within the ecosystem derive energy from the periodic pulsing pressure waves of the water. Refer to ecological analysis-2497/C-1 for further information.

At a corner of C-1, a large shaft can be found that continues the descent into SCP-2497.
At -2590 meters, the water begins to get noticeably warmer, at five degrees Celsius, as opposed to four degrees Celsius at the entrance of the tunnel. This is likely due to thermal vents or other sources of geothermal energy.

At -3300 meters, the tunnel splits in two, designated as Tunnel 1 (T-1) and Tunnel 2 (T-2). T-2 heads off in an oblique direction and ends in another massive cavity, similar to C-1. This cavity, classified as Cavity-2 (C-2), contains an ecosystem similar to the one found in C-1. However, the ecosystem found in C-2 is more diverse, and contains tertiary consumers, unlike the ecosystem found in C-1. This is due to the abundance of primary producers within C-2. Research suggests that the abundance could be explained by the stronger pulsing pressure waves within the cavity. Refer to ecological analysis-2497/C-1 for further information.

T-1 continues to descend in near-vertical fashion.
Research vessel video feed is lost at approximately -5000m due to limitations of data transmission. However, research vessels equipped with radio communications can continue to transmit gathered data. By this depth, temperature within the shaft reaches fifteen degrees Celsius, and T-1's vertical drop shows no signs of halting.

Approximately -6500 meters into SCP-2497, T-1 abruptly opens to an extraordinarily massive body of water of unknown dimensions, classified as SCP-2497-1. Pressure readings suggest that the source of the periodic pressure waves is located somewhere deeper within SCP-2497-1. It is unknown if SCP-2497-1's immense topography is anomalous, as no end to the abyss has yet to be discovered. (Authorized personnel can refer to log-1B)

Addendum 2471.1: Incident Reports

Addendum 2471.2: Ecological Analysis Reports

Addendum 2471.3: Research Logs