As innocent as the Bosnian Pyramids appear, something odd has appeared in radioactive readings. During the summer of 2010, more than 500 volunteers and 45 archaeologists from 30 countries embarked on one of the world's most impressive archaeological projects.The footage in this video takes you deep into the Ravne Tunnels. Some of the tunnels themselves are bizarre to say the least. Barely big enough for a child to slip through the hole. Who were the people taking refuge done here? How and what did they use to navigate this labyrinth of tunnels?
