nubbsgalore: photos of the the sơn doòng cave in vietnam. at 200 metres high, 150 metres wide and fi
nubbsgalore: photos of the the sơn doòng cave in vietnam. at 200 metres high, 150 metres wide and five kilometres long, it is the biggest cave in the world – so large, it has its own river, jungle and even climate. it also contains the world’s tallest stalagmite, which stands over 80 metres tall (consider that it was formed one drop of mineral saturated water at a time). despite its immense underground size, the cave is practically invisible from the outside, seen only from the mist wafting from surface cracks. with a huge temperature difference between the cooler air inside the cave and warmer outside air, son doong is home to moving clouds of mist, which can be illuminated by natural light up to four kilometres away. (source x, x) -- source link