The rail tunnel is a subterranean area of Earth 3.0, notable for connecting a maintenance closet that overlaps Sublevel Three of Bethlehem Medical Centre with an abandoned missile silo a few miles away. Templar discovered the tunnel and overlap points at some point in the mid 90s and restored parts of the electrical system to working order. The tunnel serves as a covert evacuation route, enabling anyone who can transition between realities to escape from beneath BMC without egressing to the surface.