An armoured train vehicle and a rail-mounted hook for ripping up railway tracks were lurking behind a former museum building when I visited Sarajevo in July 2007.
The railway vehicles were built for narrow gauge track. This would presumably be 2ft 6in/760 mm gauge, as Yugoslavia once had an extensive network to that gauge. Unfortunately I don’t know anything more about them.
There was also a tank, a big gun and a helicopter, all of which had seen better days, plus an abandoned statue of someone who had presumably fallen from favour and been hidden away behind the museum.
Called a Schienenwolf (rail wolf) in German, wrecking hooks like this would be pulled by a locomotive to destroy railway tracks behind a retreating army to prevent the line being used by the enemy.
Comparing it with pictures of tanks online, this might be a M3 light tank, a type which Yugoslav partisans used in the Second World War.
This helicopter has seen better days. According to airliners.net, it is Bosnia-Herzegovina Air Force Mil Mi-8T number VF-3801.
The ugly and box-like historical museum building was fairly easy to find, close to the national museum. Trams stop nearby, and though the museum appeared to be abandoned when I visited, the outdoor exhibits were freely accessible round the back.