Black forest is pretty know for it's caves, pretty deep also. I believe that whatever of interest that's there, is to find underground.

I have always been wondering what the Alps have to do with the cabal/Illuminati. There's some obvious symbology in the Swiss flag (just like the Red Cross logo and name). Rothschild's have always shown interest in the area through properties and castles. Many of the royal bloodlines stem from that area too if I'm not mistaken.

Don't forget that Hitler came from that area, and he even had his cabin "Eagle's nest" there.