Two Belgian tourists visit prehistoric KTK Tunnel entrance on July 19, 2017 and give their opinions on its construction. "Built, Not Dug: KTK Tunnel Was Left as an Empty Space in an Artificially Constructed Claystone Hill in the Bosnian Pyramid Complex" http://anamericaninbosnia.blogspot.com/2015/05/built-not-dug-ktk-tunnel-was-left-as.html It makes sense that the ancients would not sit their structures on top of the earth but would tie them together structurally across valleys and riverbeds. "We know that [the Fojnica river course] is engineered, because we can see there's an angle [of the baked clay layers] to the river flow. It's always an angle. It's never straight-on, and it's never perpendicular. . . . And it's also built in, it's angling in. . . . It's angled down like that, and that makes for a strong structure. Now, why did they angle it down at this particular angle on the Fojnica River? Unknown. What we need to do is get some geologists out here who actually know what they're doing. Not graduates from Yale, probably, because we know that Robert Schoch has already, what's the word, shamed the Yale geology department by coming out of [Visoko, Bosnia] with scandalous nonsense. [We need] a geologist who actually knows what they're doing, whether they have a Ph.D. or not, to tell us what these angles are, what this stuff is made of, and give us a full analysis of this built riverbed. I promised you that we would find out if this river[bed] is built. I thought I was going to have to go into the water, today, to discover that. . . . But in fact, here we are much more easily simply walking along an incredibly evocative set of clay layers that really, really speaks strongly about the engineering knowhow of the ancients." - Jock Doubleday (start minute 8:39) "Built by the Ancients: Fojnica River in the Bosnian Pyramid Complex" https://www.youtube.com/watch?v=yTbKwj9UJt4 "Now we have clear and voluminous evidence that the Fojnica River itself was built. The riverbed is composed of adhered baked clay layers inclined against the flow of the river, creating what Shawn Rateau calls a "braking system" and what Christoffer Kindmark calls an "anti-flooding system." The hardened and adhered clay layers are also at various angles to the flow of the river, directing the water around bends in the river to prevent erosion. The clay layers *tie together* the artificial structures on both sides of the river. The ancients liked to work, and they wanted their structures to last." - Jock Doubleday "Built by the Ancients: Fojnica River in the Bosnian Pyramid Complex, August 5, 2015" https://www.youtube.com/watch?list=PLt_TE56WfD9-yjx2Wq9sZVuk4UmYm5MhM&v=yTbKwj9UJt4 This scouting expedition led to another exploration of the river three days later that confirmed ... https://www.youtube.com/watch?v=LZ2S9osT1_A