While not physically connected to Son Doong, Hang Nuoc Nut and Hang Va are parts of Son Doong cave system based on their shared water flow. Nonetheless, it is said that the stalactites and stalagmites in these caves are even more beautiful, extraordinary and worth seeing than that in Son Doong. Unlike other caves in Vietnam and elsewhere in the world, stalactite columns here are formed in a very unusual way. They are formed from a hard material (wood branches, grains of sand …) at the bottom of the lake, the water level rises over time carrying calcium and clinging to these hard objects, which soon turns into stalactite columns.
Since these caves were found recently in 2012, the entrance is not yet to be built. Therefore, to put early human steps into the cave, you will have to hike, stoop through the entrance, use ropes and cross some rivers including one inside the caves. This experience would surely be an unique and unforgettable expedition for those who like to challenge themselves and see discover unusual things.