After a climb up to the cave entrance in Phong Nha ke Bang National Park, we descended into a wonderland through a small opening.
Having visited the Jenolan Caves west of Sydney, Australia, I found this cave similar with the same limestone formations. What made it stand out even more was the sheer size.
We walked for a kilometre into the cave where at one point, the roof was eighty metres above. Each turn brought another spectacular formation into view and there was still another almost thirty kilometres of cave that was not open to the public.