Bucket list type of thing.

[V8Druid]

The V2 factory at Mittelbau-Dora was certainly in a tunnel system driven into the side of a hill.
The tunnels were still sealed off (from being blasted at the end of the war) when I was there, but apparently have now been opened for access.

yep - same.

was on my own, on the Kawi and took me a while to get my head straight ... one of the things that struck me most was the silence there .. (virtually) no bird song - was a haunting experience, never forgotten - 35 years ago now!