From Serbia to Karlštejn or a ride on a double-decker train

We went on this trip primarily to fulfill the wishes of 5-year-old Pavlík. He really wanted to ride the double-decker train. His eyes just lit up and if the poor guy had any idea that he had a 17km walk ahead of him, he probably would have lost his appetite 
From the railway station in Serbia, we set off along Berounka in the direction of Svatý Jan pod Skalou. On the left the river and on the right the rocks on which the climbers are hanging. Actually, all the way to Ján, you walk along…