Quiz: What Do You REALLY Know About The Planet You Live On?

1920px Son Doong Cave DB (3)
Dave Bunnell [CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)]

8. The Largest Cave Ever Recorded Is Found In Which Country?

Germany

Vietnam

Ireland

USA
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Kalen Snyder hasn't written a bio just yet, but if they had... it would appear here.