Ecosystems at Risk: Limestone caves
2. Location
Longest Caves
(1995)
  
Name Country Length km
Mammoth Cave system USA 531
Optimisticheskays Ukraine 183
Holloch Switzerland 156
Jewel Cave USA 145
Sieben Hengste .. Switzerland 126
Windy Cave USA 113
Ojernaja Ukraine 111
Lechugilla Cave USA 106
Fisher Ridge C. USA 104
Gua Air Jernih Malaysia 102
Deepest Caves (1995)  
Name Country Depth (m)
Reseau Jean-Bern... France 1602
Lamprechtsofen....... Austria 1535
Gouffre Mirolda...... France 1520
Shakta Vjacheslava Georgia 1508
Sistema Huautla Mexico 1475
Sistema de la Trave Spain 1441
Boj-Bulok Uzbekistan 1415
Illaminako Ateenoko... Spain 1408
Lukina Jama Croatia 1393
Sistema Cheve Mexico 1386
Tables from D. Gillieson, Caves, Processes, Development, Management 1996

Keep in mind that the above list will change as cave exploration continues. Perhaps some areas of the
world have been explored more than others and deeper caves will be found in the tropics and other less explored areas.
Location of limestone areas in New South Wales  
    air photo Yarrangobilly