I'm having trouble finding anything that isn't either Flathead, Old Cascade, New Cascade, or the one under Seattle. I know the GN went through many very old tunnels--I just can't find photos of their portals. Once I walked along the Cascade route just west of Leavenworth and found a beautiful tunnel portal, but for the life of me I can't remember what it looked like--and I live too far away now to drive there.
I'm just looking for plain, vanilla tunnels--not fancy ones.
I've searched Google till my eyes are googling. Can anyone help with photos?