Hang Son Doong: The world's biggest cave, so 'outrageous in size' it fits 2 jungles and the 'Great Wall of Vietnam' —Al Naslaa rock: Saudi Arabia's enigmatic sandstone block that's split ...

There is also an enormous range of natural biodiversity here, which makes the delta home to a stunning array of birdlife, aquatic animals ... s largest cave, the Son Doong, is vast enough for ...

Scientists have discovered a new land snail species, Calybium plicatus, in the first sinkhole of Son Doong Cave, underscoring Vietnam’s extraordinary biodiversity. Specimen of the newly discovered ...

Son Doong Cave: While scientists are busy searching for life on other planets, references to otherworldly realms can also be found in ancient scriptures and mythologies. Several religious texts ...