In the overview below three levels of layout are visible: the mainline climbing out of Scranton; the Mount Pocono Auto Facility on the upper level; and the Reading/EL interchange yard in Rupert. The mainline continues east from here to the Nay Aug tunnels.
These three photos show the
approach to the tunnels (there are two bores, but after the west portal area
was washed out by Hurricane Diane in 1955, only one was restored to use).
As on the prototype, the grade levels through the tunnels and resumes to the
east. The west portals are concrete while the east portals are natural rock.
First, the approach to the tunnels:
Next, the location of the west
portals:

And the east portal location:
