World’s Biggest Cave, Son Doong, Is Even Bigger

British divers found an underwater tunnel from Son Doong cave in Vietnam in April 2019. It may link to another cave called Hang Thung.

Key Facts

• Cave: Son Doong, Vietnam
• Volume: 38.5 million cubic metres
• Discovery: April 2019
• Link could add 1.6 million cubic metres
• Divers included Rick Stanton and John Volanthen

Correction

An earlier version said this happened “last month”. The dive took place in April 2019.

The Dive

Divers Jason Mallinson, Rick Stanton, Chris Jewell and John Volanthen found the tunnel. Hang Thung is about 600 metres away.

Frequently Asked Questions

Where is Son Doong?

In central Vietnam.

How big is it?

38.5 million cubic metres.

When was the tunnel found?

April 2019.

Conclusion

Son Doong keeps surprising explorers.

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