The Chur city bus no. 2 takes you to the starting point of this historic hiking tour. At the «Obere Au», where the sports grounds of the city with large swimming pools are situated, you walk through the forest and along the tennis courts to the campsite Au. From there, you walk on the right side of the Rhine river to the village of Haldenstein (playground and barbecue area). There, cross the Rhine and walk into the village. Soon you will see the gorgeous castle of Haldenstein and the ruin of Haldenstein, that is situated further up in the forest. The ruin of Haldenstein is difficult to access. The inner piece of the castle is accessible through a narrow rock ledge, that is very exposed. Alternatively, you can pull yourself through a window to enter the castle. Finally, visit the ruins of Lichtenstein and Grottenstein and walk back to the village of Haldenstein, where you can take the Chur city bus no. 3 back to town.