Hundreds of tiny, well-preserved hills (known as heaps) can be found to the west of Boží Dar. They are evidence of the importance of panning for tin in the highest parts of the Erzgebirge. Placer mining for cassiterite was carried out here from at least the 16th century and continued until the start of the 19th century. The total area of the placer deposit landscape adds up to over 250,000 square metres, making it one of the largest tin placer deposit areas in central Europe. Most of the heaps are between 5 and 10 metres in length. However, some are over 20 metres long and a number are over 2 metres high. Many placers are found downstream of the Černá brook near Myslivny and Ryžovna. The placers represent a unique element of the local mining landscape. The landscape is also notable for its characteristic vegetation, which differs from that of the surrounding area.