AND BECAME KNOWN INTERNATIONALLY IN 2009 THANKS TO BRITISH CAVER...

1991, and became known internationally in 2009 thanks to British cavers, led by Howard Limbert. Thecave was formed about 2 to 5 million years ago by river water eroding away the limestone underneaththe mountain. It contains some of the tallest known stalagmites in the world - up to 70 metres tall.Thecave is more than 200 metres wide, 150 metres high, and nearly 9 kilometres long, with caverns bigenough to fit an entire street inside them. Son Doong Cave is recognised as the largest cave in the worldby BCRA (British Cave Research Association) and selected as one of the most beautiful on earth by theBBC (British Broadcasting Corporation).In August 2013, the first tourist group explored the cave on a guided tour. Permits are now required to access the cave and are made available on a limited basis. Only 500 permits were issued for the 2015 season, which runs from February to August. After August, heavy rains cause river levels to rise and make the cave largely inaccessible.True/false