Where is the world's largest known cave passage located?

in Mexico
in Norway
in Georgia
in Vietnam
Hang Sơn Đoòng is a solutional cave in Phong Nha-Kẻ Bàng National Park, Vietnam near the Laos-Vietnam border. Its total length is approx. 9 km and its main passage is the largest known in the world, being more than 5 km long, 200 m high and 150 m wide. It was discovered in 1991 and the first tourist group explored the cave in 2013.
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Very interesting!
reach: rather globalAsiacavesgeographytourist attractionsVietnam

Answers by country

in Mexico
in Norway
in Georgia
in Vietnam
answers
flagPakistan
8%
8%
8%
75%
12
flagRepublic of Ireland
10%
0%
30%
60%
10
flagGreece
50%
0%
14%
35%
14
flagItaly
19%
4%
42%
33%
21
flagIndia
22%
16%
22%
33%
18
flagPoland
32%
8%
29%
29%
1640
flagAustria
40%
13%
20%
26%
15
flagthe United States
35%
10%
29%
24%
65
flagAustralia
17%
11%
47%
23%
17
flagGermany
42%
11%
24%
21%
61
flagthe United Kingdom
35%
8%
35%
20%
34