Osmanagić also offers as evidence the existence of a vast network of tunnels connecting all of his pyramids, and which exit at the summit of each. If true, this would certainly be interesting, but it would not, as he claims, make it consistent with man-made pyramids, as no known pyramids had any such network of tunnels connecting them that we know of. He offers video of one of the tunnels being explored. However this tunnel is the only one found so far, went back only 300 meters, and is located 3 kilometers away from Visočica. It could be an old mine shaft, nobody really knows (the area has been mined for coal, iron, and copper since Roman times); but there's certainly no evidence that the tunnel goes anywhere near Visočica or any other of Osmanagić's hills. Apparently he deduced the existence of a tunnel network from old, unsourced local stories about children going into one hill and emerging at the top of another. So much for the alleged "network of tunnels". If it exists at all, it certainly has never been found or detected.