Deep in the most remote and inaccessible mountains of Kurdistan the Kurdish Fighters have discovered ancient places and artifacts, thought to be of Gordyene or Korduchoi origin, that have laid on the ground or in caves for thousands of years undiscovered. These discoveries are thought to be more than 3,000 years old. The photo taken by a Kurdish fighter shows a round tunnel cut through solid rock thousands of years ago on a step mountain path. Unfortunately it will be many years before it is save for archaeologist to study these very ancient discoveries.
http://www.utaot.com/2012/12/23/kurdish-freedom-fighters-discovered-ancient-places-and-artifacts/ Personal note: To me this ‘round’ hole cut though the rock may not be for a walking path as most people believe. Most tunnels cut through rock were rectangular, some with round ceiling for strength and all with flat walking surface. This tunnel being round may indicate that this could have been used as a pipe line (water?) in very ancient times. What if the tunnel was cut 10,000 – 60,000 years ago by an unknown advanced civilization that had some type of pipe line coming down from or through the mountains. Today we have pipe lines going over and through mountains to transfer oil, gas and water. Could very ancient people be doing the same thing?