The rock wall of creamy quartzite is located at Záskalí in Železný Brod (the road to the left, some 200 metres behind the town swimming-pool). The rock formation is a good example of frost weathering from the Ice Age, when the stone sea had formed this rock wall. Its eastern part is stretched more than 50 metres, here and there it is only 2 metres wide. In the western part, the quartzite wall reaches up to 20 metres high.