There is an underground path that goes from one part of Sarajevo to the airport, under once Serbian lines as a method of escape and to get resources. This week on for a a few hundred meters, as people hunched over walked in hopes of escaping war. The tunnel is still around today, although you can only walk 25 meters through it with a museum on top filled with photographs of war and a film of home footage of the siege. This home claims to be the exit of the tunnel, however, it is still heavily disputed with the neighbor across the street (first picture) who claims to the point of painting it on his house, that his home is the real portal to the tunnel.
The cost of entrance to this site: 5km plus a taxi to the obscure home, sitting in a typical neighborhood.