Only five kilometers from the Bosnian Pyramid of the Sun there is a place called Gornje Vratnice. The elevations Tropokalija and Dolovi have a perfect geometry. First of all, there is a semicircular formation which continually stretches into the neighboring hill/elevation. Dolovi location looks like a split cylinder.
The preliminary analyses conducted by the German and Serbian geophysicists showed the existence of the perfect stone terraces. In Dolovi, there are paved layers covered with smaller stone blocks. Toprakalija is an extraordinary stone shrine/tumulus, where the largest megalithic block has been found.
Considering the fact that identical design and material was found on the Bosnian Pyramid of the Moon and on this location (Gornje Vratnice), it reasonable to assume that this was the work of the same civilization, from the same time-period.
Because of this fact, Gornja Vratnica could hold the key in solving the mystery of the Bosnian Valley of the Pyramids.
