The Origin of Tunnels

There is very little archaeological evidence behind these tunnels that make placing an origin on when these tunnels came into being very, very difficult. People have observed coal. They have seen stones and seramics found in these tunnels. And that kind of suggests that the origin of these tunnels is somewhere between the year nine 50 all over to the twelfth century. But either way, the most experts tend to agree that regardless of their origin, they were simply protection from preditors or otherwise storage of things. Or some even believe that there were ways to travel safely from one area to another during times of war or violence,. Either way, they wouldn't be very efficient modes of transportation, because they are as