Many stories and myths entwine around this deep hole. For one, the small almost circular lake is something special, because next to the Guineas Lake, it is the only natural, constantly filled lake in Namibia. Both lakes were formed by the collapse of underground karst cavities, which were then filled with groundwater. The lake is a large sinkhole with vertical Dolomite walls, and the collapsed ceiling is now on the lake bottom. According to a legend, the lake is infinitely deep but measured a depth that varies between 6 and 71 meters, in some places it is even over 145 meters. The shape resembles an inverted mushroom and visitors only see the stalk, the rest of the larger cave is invisible from above. In July 1915, the German Schutztruppe sank its last cannons and rifles in the lake before surrendering to the South African troops. Some of these machine guns and field guns, along with ammunition boxes, were recovered from the lake in the late 1980s and are now restored in the Tsumeb Museum.