Architecturally, Strač is one of the most interesting old fortifications, as well one of the biggest in the whole Balkan. It located south east of Trebinje with the elevation of 750m. It has a beautiful view of Zupci, Petrovo polje, Trebinje and Trebinje forest. During the Austro-Hungarian period, Trebinje was one of the most protected cities. Each hill above the city had a fortification from which a potential attack could be seen so the people could be alarmed and respond to it. Unlike others, Strač was buried under ground for the major part, and because of this it is considered the most mysterious object of that time.The symbol of power of this fort is represented in its iron cannon domes on the top, which still resist the imminence of time, but human negligence as well, which caused significant damage to the object. It is interesting that Austrian experts have converted the then currency crown to today’s Euro, and calculated that the construction of this fortification cost the astonishing 60 million Euros.