How does it look like to enter prehistorical tunnels which has been closed for thousands of years? Team of experts from the ‘Archaeological Park: Bosnian Pyramid of the Sun’ Foundation investigates newly discovered tunnel in the Bosnian Valley of the Pyramids in Visoko, Bosnia-Herzegovina. Who made this tunnel complex? Who closed all side tunnels with the filler material and drywalls? What are the values of the beneficial negative ions? Exciting times, indeed!
