Additionally, nearby caves in the Lonetal (Lone valley) have sources of ancient carvings (see Lion man). The Lone valley may have even been home to two different types of humans. It appears likely that both the Neanderthal and the Cro-Magnon may have occupied the valley. Professor Riek, who discovered many of the early carvings, wrote a documentary novel entitled "Die Mammutjäger im Lonetal" (Mammoth hunters in the Lone Valley) which included violent conflicts between the "Bärentöter" (Bear Killers or Neanderthal) and the "Mammutjäger" (Mammoth Hunters or Homo Sapiens).