The author starts by summarising the previously known and published folk traditions concerning the Dobrna or Snake Castle (Schlangenburg), which he then compares to the preserved and now written fragments of an oral tradition he collected at Dobrna and its surroundings with a group of his students in May 2014. Most attention is devoted to a fragment which points to a (leather) bridge that once connected the Dobrna Castle with the nearby Gradišče pri Dobrni – a Hallstatt settlement according to the archaeological finds, situated south of the Church of St. Nicholas. The comparison of this fragment with traditions concerning the castles in the so-called Dobrna plain reveals that the tradition on a leather bridge connecting a medieval castle and the nearby hill named Gradišče can also be found at least at Vitanje, Vojnik, Lančperg, Helfenberg, i.e. the castles in the so-called Dobrna plain or on its fringes. In the author’s opinion, this testifies to pre-Christian mythological bases of the tradition, through which almost every local settlement incorporated a similar »setting« of the mythological narrative that still remains largely unknown to us. The author concludes his contribution by listing a few examples of similar traditions in Moravia, Serbia and Croatia.