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Countries with the Longest Caves

Name the countries with the longest caves.
Using rough measurements found on Wikipedia
Quiz by
Pontiac
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Last updated: February 3, 2026
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First submittedFebruary 3, 2026
Times taken16
Average score58.3%
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Longest Cave
Answer
1
Mammoth
United States
2
Sistema Ox Bel Ha
Mexico
3
Shuanghedong Cave Network
China
7
Clearwater Cave System
Malaysia
8
Optymistychna Cave
Ukraine
11
Sistema del Alto Tejuelo
Spain
12
Hölloch
Switzerland
14
Schönberg Cave System
Austria
18
Réseau Félix Trombe
France
19
Marosakabe cave system
Madagascar
20
Bullita Cave
Australia
24
Toca da Boa Vista
Brazil
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