Hi you all! I'm new here, but I've been following this thread and all the news about the bosnian pyramid and, after seeing the latest pictures posted here, I just couldn't stand it and had to post some words...
I'm not a geologist or an archeologist, but well, it seems very obvious to me that this is a sandstone strata, just like in this picture:
And this writing
Looks like alphabetical writing... I can see an E and maybe a lambda, with a couple of arrows (maybe pointed Ts). Well, just looking at wikipedia, the greek alphabet is more or less 3000 years old. So, those aren't for sure 8000 yrs old as Osmanagic is claiming. My bet is that those tunnels are old mines (roman or medieval) and the letters are just some markings that the miners made. Don't forget that on Visoko hill there was a castle built on the top, over the ruins of a roman fort. And I think there was a medieval graveyard too.
Anyway, a few of those blocks look man-made, but most of them are obviously natural, so obviously that I can't believe that a geologist could say that they have been manufactured. This casts heavy doubts on all this pyramid thing...