Here are views of all the tunnel portals that we either went through on this trip or saw that were no longer in use. All are the south portals except for one which is in a very special location in the present.
Tunnel 5.
Tunnel 6.
Tunnel 8.
Tunnel 9.
Tunnel 10.
Tunnel 11.
Tunnel 12.
Tunnel 13.
Tunnel 14.
Tunnel 15.
Tunnel 15A.
Tunnel 15 north portal.
Tunnel 16.
