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ABC aired a "chương trình trực tiếp" called "Good Moring America" in May 2015.
live program
Son Doong Cave became "được biết đến khắp thế giới" in 2009 thanks to British cavers, led by Howard Limbert.
known internationally
The cave contains some of the tallest known "cây măng đá" in the world - up to 70 metres tall.
stalagmites
Son Doong Cave is "được công nhận" as the largest cave in the world by BCRA.
recognised
In August 2013, the first tourist group explored the cave on a "tour có hướng dẫn viên".
guided tour
"Giấy phép" are now required to access the cave.
permits
Permits are made available "với số lượng ít".
on a limited basis
Heavy rains cause "mực nước sông" to rise.
river levels
Heavy rain also makes the cave largely "không đi vào được".
inaccessible
River water "làm mòn" the limestone underneath the mountain.
erodes
