We invite you to an adventure of visiting the remnants of the defense system of the southern border of the Austro-Hungarian Empire. At the end of the 19th and the beginning of the 20th century, this was one of the strongest and largest defense systems in Europe. It amazes many connoisseurs with its brilliant strategic and tactical set-up, which reveals itself to you in five thematic trails. Follow them, whether by traveling or hiking through Boka Bay, its hinterland and Herzegovina. You will enjoy breathtaking viewpoints and through interesting stories you will get to know the lives of ordinary people of that time.