WORLD’S BIGGEST CAVES

1. Mammoth Cave System 

In the US. 360 miles long.

2.Wind Cave 

In the US. 109.54 miles long.

3.Lechuguilla Cave 

In the US. 111.91 miles long.

4.Ojo Guarena 

In Spain. 62.16 miles long.

5.Fisher Ridge Cave System 

In the US. 106.88 miles long.

6.Jewel Cave 

In the US. 129.07 miles long.

7.Optimisticheskaya 

In Ukraine. 132.97 miles long.

8.Holloch 

In Switzerland. 117.46 miles long.

9.Siebenhengste-hohgant-Höhlensystem 

In Switzerland. 90.10 miles long.

10.Gua Air jernih 

In Malaysia. 67.73 miles long.

11.Toca da Boa Vista 

In Brazil. 63.38 miles long.

12.Sistema Purificacion 

In Mexico. 58.26 miles long.

13.Zolushka 

In Ukraine and Moldova. 57.17 miles long.

14.Raucherkarhöhle 

In Austria. 51.38 miles long

15.Sistema Ox Bel Ha 

In Mexico. 82.92 miles long.

16.Ozernaya 

In Ukraine. 75.81 miles long.

17.Grubstein-Westwandhohle 

In Austria. 62.44 miles long.

18.Bullita Cave System 

In Australia. 57.79 miles long.

19.Hirlatzhöhle 

In Austria. 57.04 miles long.

20.Réseau de la Coumo d'Hyouernedo 

In France. 65.72 miles long.