If you go to Sarajevo and visit the Sarajevo war tunnel exhibit at the Kohlar's house, they will tell you that their house was the tunnel entrance. That is not actually true however, this house across the street is the actual tunnel entrance for the Butmir side of the tunnel. You can actually go to the house and see the original entrance, it is still there. The Kohlar's are actually a well connected family and have been given this honor even though it is built on a lie. It doesn't change the enjoyment of going and seeing the tunnel yourself, just make sure to go across the street and see the actual wartime house and tunnel.