The alcove located near the intersection of the entrance corridor
and the main branch (09/10/1999).
There are two storage alcoves in the concrete pillbox. We don't know
for certain their exact function. If we hazard a guess:
for the first, located on the right of the entrance corridor, it can be
assumed that it was used for storing ammunition.
for the second, located near the intersection of the entrance corridor
and the main branch and characterized by a square opening in the pavement,
one can assume that it contained equipment for recirculating the air.
