The entrance of Krem Um Ladaw lies at one side of a giant river bed. The black void is surrounded by huge waterworn boulders, all eroded from weeks and weeks of ferocious waters tumbling them along the rocky floor. At a particular time of the day, a sun beam fires through a gap in the forest canopy and enters the cave. It’s a wondrous and magical sight that warms everything in its path. Swiss caver Marie-José Gilbert enjoyed a brief rest whilst I took this photograph.