The Arnhem Caves are unique in Namibia. Visitors can explore five species of bats living in the 4.5 kilometre long Arnhem Caves, the largest caves in Namibia, which were discovered by farmer Bekker in 1930. You must stay at the Lodge or Campsite to be able to enter the caves with a guide. the tour costs N$280 per person. It gets very hot in there so take enough water and headlights if possible, otheriwse the guide will equip you with both of it.