---QUOTATION--- Riese [ˈʁiːzə] (German for "giant" is the code name for a construction project of Nazi Germany in 1943–1945, consisting of seven underground structures located in the Owl Mountains and Książ Castle in Lower Silesia, previously Germany, now a territory of Poland.
None of them were finished; all are in different states of completion with only a small percentage of tunnels reinforced by concrete. ---END QUOTATION---
This has always been a fascinating place and situation to me. I remember it's location being used in the James Bond movie with Timothy Dalton in "The Living Daylights" ( 1987 ) and here's a few links related to that:
I've always found it fascinating that the Germans never tried to take it in World War II and that it remained in British hands during the whole duration.
(2) Project Riese and Complex Osówka
I actually recently saw an hour long program on TV about this area. It's focus was the search for the mythical "Nazi Gold Train" and the efforts of several Polish locals that they believed it was in this same area. They even went to several locations related to this. When people realize this was not in Poland at the time but was part of Germany, it makes more sense. Here's several short clips related to that subject:
---QUOTATION--- (2) Project Riese and Complex Osówka
I actually recently saw an hour long program on TV about this area. It's focus was the search for the mythical "Nazi Gold Train" and the efforts of several Polish locals that they believed it was in this same area. ---END QUOTATION---
Yeah I was reminded of that train too. After it was mentioned in the news, things got very quiet:
The dig was halted after seven days when no tracks, tunnel or train were found. The radar images thought to have been the train were revealed to be natural ice formations. An official from the town admitted tourism was up 44% for the year, and said "the publicity the town has gotten in the global media is worth roughly around $200 million. Our annual budget for promotion is $380,000, so think about that. Whether the explorers find anything or not, that gold train has already arrived." The town mayor was considering naming a roundabout after Koper and Richter.
That's a fascinating link about that Cave. The thing I always think about is their primitive means of lighting. You have a torch and nothing better. If it goes out and you can't get it relit, you are truly screwed. Especially in a Cave like that with it's narrow passages and it's steep incline dropping into the final chamber.
You just don't realize how crazy exploring that is in ancient times until you see this video: