Narrow-gauge railways in Bosnia and Herzegovina
Most Bosnian-gauge railway lines were built during the Austro-Hungarian Empire. Several 760 mm (2 ft 5+15⁄16 in) gauge railways were planned in order to link the extensive narrow-gauge railways in the Austro-Hungarian Empire with those in Bosnia and Herzegovina.
Source: Wikipedia — Narrow-gauge railways in Bosnia and Herzegovina (CC BY-SA 4.0)