Per 
The northern tunnel entrance leading to SCP-XXXX
Item #: SCP-XXXX
Object Class: Safe
Special Containment Procedures: The non-anomalous side of the tunnel is to be kept sealed with a 1ft layer of concrete with all track leading to the tunnel removed. Whereas the entrance of SCP-XXXX to be bordered up and marked as condemned, with all unexpected visitors to be escorted and administered Class B amnestics. Entry into SCP-XXXX may only be granted for D-Class for the sole purpose of testing and exploration within the SCP via the permission of the site director to researchers of clearance level 3 or higher.
Description: SCP-XXXX is the north entrance to a tunnel for a disused railway located near ███████, Florida having been abandoned since 1986. Anyone who passes through SCP-XXXX from the south entrance would pass out the other end with no recorded effects, which called for the sealing of the south entrance. However those who enter from the north side will instead exit onto a 1.5km train bridge with the surrounding area described as being extremely foggy, only being able to see 10-20m in all directions. The bridge only has enough for a train to pass through thougha slow river does pass underneath the bridge out of sight (See EXP-LOG-XXXX-3).
Roughly every 2-3 hours a whistle will be heard deep within the tunnel before a steam train identical to those used in 1920's-1930's America carrying 6 passenger carriages, designated SCP-XXXX-B, emerges from the tunnel, blasting down the track at full speed before eventually disappearing through the fog. It is unknown so far where the train comes from or goes to as re-entering the tunnel will eventually exit anyone from SCP-XXXX and so far impossible to catch or board SCP-XXXX-B and tracking devices do not seem to work within SCP-XXXX. Exploration log EXP-LOG-XXXX-10 have shown what appears sightings of ghostly figures on the train, SCP-XXXX-C, it's unknown who they are and none have been spotted outside of the train as of yet.
Following the bridge to the other side will bring the person back onto land with the area to each side is described as being grassy, covered in different flora such as varying types of trees and flowers, no anomalous properties have been detected with the plant life, with any explored areas being Earth-like. Long-term exposure to SCP-XXXX is to be limited as after 4 hours of being inside SCP-XXXX makes any visitors start to feel dread and anxiety with emotions growing based on the time spent inside, with those having spent at least 48 hours inside feeling long-term uneasiness once having left SCP-XXXX.
Approximately 2km from the end of the train bridge along the track, a railroad crossing was discovered, the intersecting 2-lane road was explored far out on both sides with little important discovered. Request to try and bring in a vehicle to further travel the road has been sent to the O5 council and is waiting approval.
EXP-LOG-XXXX-3 - 22/10/200█
Subject: D-12483
Exploration summary: Train approaches when subject is on the bridge before leaping off the edge and landing in water
Analysis: Bring waterproof cameras next time. Test water.
EXP-LOG-XXXX-4 - 25/10/200█
Subject: D-11912
Exploration summary: Sample of river water collected for testing
Analysis: Water was found to be similar to clean freshwater from rivers from Earth
EXP-LOG-XXXX-10 - 22/10/200█
Subject: D-18229
Exploration summary: Recording showed several dark, ghost-like figures inside the passenger carriages
Analysis: More exploration is required to find what these entities are
