Some concrete bunkers were built before the Second World War by the army of the kingdom. Type MG / 12 (machine gun nest) in the area of Petrovaradin Fortress.

Petrovaradin fortress. One of the largest, most preserved, most complex, counter-mine systems in Europe, beside Terezin and Josefov.

Counter-scarp gallery "Karls Mine" I level (photo: Nenad Šeguljev 2018)

Communicaton gallery II level "Prinz Eugene Mine" (photo: Nenad Šeguljev 2014)

Forgotten, neglected, unprotected, unknown... One of eight forts around Serbian town Zaječar. Late 19th century fortifications of beautiful and unique desing. (photo: Nenad Šeguljev 2019)

Fort Mihailo Ilić

• Fort Stevan Sinđelić 43°52’41.97″N 22°21’8.74″E

Greetings from Petrovaradin fortress (foto: Nenad Šeguljev 2014)

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