This guy here https://lemmy.world/comment/8658597 made a little SCP entry for the cave, and I just had to see what chatgpt could do. It seems good enough to share, so -

ChatGPT

Item #: SCP-XXXX

Object Class: Euclid

Special Containment Procedures: SCP-XXXX is located in [REDACTED], and is to be secured by a perimeter of no less than 5 km, with signs indicating a protected wildlife reserve to deter public entry. Foundation personnel stationed at Outpost-XXXX are to monitor the perimeter for unauthorized access and conduct regular expeditions into SCP-XXXX to study its properties and effects.

Entrance to SCP-XXXX is restricted to Level 3 personnel and above, and requires approval from at least two (2) Level 4 researchers. Any electronic devices taken into SCP-XXXX must be approved by the research team leader and equipped with tracking and data logging functions to monitor the signal strength and any other anomalous effects experienced within the cave.

Due to the unique properties of SCP-XXXX, a dedicated research team is tasked with developing methods to harness or replicate the signal enhancement phenomenon in a controlled environment, under Project Codename: DeepWave.

Description: SCP-XXXX is a cave system located in [REDACTED]. Initial reports of the anomaly were made by local spelunkers who experienced unusual increases in their mobile phone signal strength, eventually reaching full signal bars at depths where no signal should logically be available.

Exploration and testing have confirmed that the deeper one travels into SCP-XXXX, the stronger and clearer the cell signal becomes. This phenomenon appears to affect all forms of wireless communication devices. Devices within SCP-XXXX do not connect to known satellites or terrestrial cell towers; instead, they receive signals from an unknown source. Attempts to trace the signal's origin have so far proven unsuccessful.

Further anomalies have been observed at depths exceeding 1 km. Electronic devices begin to receive messages from unknown numbers, consisting of texts, images, and videos that appear to be from various points in the future. The content of these messages varies widely, including mundane future events, significant global incidents, and occasionally, personal messages to the device's owner that are relevant to their future.

Addendum XXXX-1: Discovery Log

SCP-XXXX was discovered on [REDACTED] after local rumors reached Foundation operatives. Initial expeditions confirmed the anomalous signal strength increases and established the current containment perimeter.

Addendum XXXX-2: Incident Report XXXX-A

During an exploration on [REDACTED], a research team received a distress signal emanating from approximately 2 km deeper than any previous expedition had reached. The signal contained a warning of a containment breach of another SCP within the Foundation's custody, weeks before the actual event occurred. This incident has led to a reevaluation of SCP-XXXX's predictive capabilities and potential uses for foresight in containment protocols.

Addendum XXXX-3: Research Note

Ongoing investigations into SCP-XXXX's properties suggest that the cave may be acting as a conduit for a form of quantum entanglement with particles that convey information across time. Dr. [REDACTED] proposes that the unique geological and possibly extraterrestrial materials lining the cave walls could be creating a "natural" anomalous field, enhancing signal strength and enabling time-displaced communications. Further research is required to understand the potential implications and applications of this discovery fully