Souterrain.
A part of the tunnelsysytem can be visited with a guide. We start the tour in Pzw 721.
The hatch.
We go deep down.
But first we look back up to see the cable ducts.
Every side tunnel has an armoured door.
The way out goes with some comfort via a stairs.
We leave through the former door of the removed 20P7 in Pzw 219.
With our thanks to the guides from the Stare Kurowo agency.