Deeper underground inside Krem Um Ladaw, huge amounts of fast flowing water have carved out this perfectly sculpted circular shaft in the rock. After experiencing what we did 18 months ago in Veryovkina - the deepest-known cave in the world, I imagine this must be a terrifying and dangerous place during the Monsoon season. White water carrying flood debris from the forest above will come crashing down, making it almost certainly impassable.