If tourists contemplate a visit to Pofadder Cave close to Grootfontein, they should be warned in advance: anyone who is afraid of the dark or has an crippling fear of confined spaces should think twice before they venture into the second largest cave in Namibia. Some prior experience of abseiling is also recommended. Luckily, although it is a very shallow cave, I realised from the outset that it would be wise to film the cave with the guidance of experts: entomologist and spelaeologist John Irish and geologist Nico Scholtz were great choices both in terms of expertise and guidance.