I found out there are allot more people interesting in exploring in Romania than I've thought but they probably have no clue about the ethics of UE and all that so I won't call it ue in this case: there are people interested in getting down and dirty and dedicated to finding alternate entrances, hidden underground passage ways and the such. I found such a group of people on a motorcycle site but for now I'll settle with following the discussion.
What intrigues me the most is a system of fortifications that surrounds the Romanian capital, Bucharest. Here is one sat photo on wich one of the members of that site pinned the location of the forts on:



What I find even more interesting is that allot of people on that forum claim the forts are linked by an underground tunnel.:\
I'll use this thread to post updates and compile all I can find on the forts since the actual thread on that site is a total mess and there's no way one can follow the discussion.