# Name Depth (m) Length (km) Length (mi) Country Coordinates 1 Krubera-Voronja Cave 2224 [ 1] [ 2] [ 3] 23.0 km 14.3 mi [ 4] [ 5] Abkhazia / Georgia 43°25′04.0″N 40°18′35.4″E / 43.417778°N 40.309833°E / 43.417778; 40.309833 (Krubera-Voronja Cave ) 2 Veryovkina Cave 2209 [ 6] 17.5 km 10.9 mi [ 7] Abkhazia / Georgia 43°23′51″N 40°21′34.9″E / 43.39750°N 40.359694°E / 43.39750; 40.359694 (Veryovkina ) 3 Sarma cave 1830 [ 1] [ 8] 19.2 km 11.9 mi [ 8] Abkhazia / Georgia 43°24′56.2″N 40°21′50″E / 43.415611°N 40.36389°E / 43.415611; 40.36389 (Sarma Cave ) 4 Snezhnaja cave [ ru ] 1760 [ 9] 40.8 km 25.4 mi Abkhazia / Georgia 43°15′53″N 40°43′06″E / 43.26472°N 40.71833°E / 43.26472; 40.71833 (Snezhnaja cave ) 5 Lamprechtsofen 1727 [ 10] 61.0 km 37.9 mi [ 10] Austria 47°31′34″N 12°44′21″E / 47.52611°N 12.73917°E / 47.52611; 12.73917 (Lamprechtsofen ) 6 Gouffre Mirolda 1661 [ 11] [ 12] 22.0 km 13.7 mi [ 11] France 46°05′19.9″N 6°46′14.0″E / 46.088861°N 6.770556°E / 46.088861; 6.770556 (Gouffre Mirolda ) 7 Gouffre Jean-Bernard 1612 [ 13] 29.5 km 18.3 mi [ 14] France 46°06′08″N 6°46′46.6″E / 46.10222°N 6.779611°E / 46.10222; 6.779611 (Gouffre Jean-Bernard ) 8 Sistema del Cerro del Cuevón [ es ] 1589 [ 15] 7.0 km 4.3 mi Spain 43°13′14″N 4°51′37″W / 43.22056°N 4.86028°W / 43.22056; -4.86028 (Torca del Cerro del Cuevón ) 9 Hirlatzhöhle 1560 [ 16] 117.8 km 73.2 mi [ 16] [ 10] Austria 47°32′41.9″N 13°37′51.5″E / 47.544972°N 13.630972°E / 47.544972; 13.630972 (Hirlatzhöhle ) 10 Sistema Huautla 1560 [ 17] 100.2 km 62.3 mi [ 18] Mexico 18°07′16.37″N 96°48′00.03″W / 18.1212139°N 96.8000083°W / 18.1212139; -96.8000083 (Sótano de San Agustin, Sistema Huautla ) 11 Chevé Cave 1529 [ 19] 87.2 km 54.2 mi [ 18] Mexico 17°51′51.6″N 96°47′39.6″W / 17.864333°N 96.794333°W / 17.864333; -96.794333 (Chevé Cave ) 12 Boybuloq 1517 [ 20] 18.4 km 11.4 mi [ 21] Uzbekistan 38°23′04″N 67°30′06″E / 38.38444°N 67.50167°E / 38.38444; 67.50167 (Boybuloq Cave ) 13 Pantjuhinskaja Cave [ ru ] 1508 [ 4] 7.9 km 4.9 mi Abkhazia / Georgia 43°19′54.4″N 40°29′56.9″E / 43.331778°N 40.499139°E / 43.331778; 40.499139 (Pantjuhinskaja Cave ) 14 Sima de la Cornisa 1507 [ 15] [ 22] 6.4 km 4.0 mi Spain 43°10′45″N 04°51′51″W / 43.17917°N 4.86417°W / 43.17917; -4.86417 (Sima de la Cornisa ) 15 Čehi 2 1505 [ 23] 5.5 km 3.4 mi [ 23] Slovenia 46°22′01″N 13°30′36″E / 46.36694°N 13.51000°E / 46.36694; 13.51000 (Čehi 2 ) 16 Sistema del Trave [ fr ] 1441 [ 15] 9.1 km 5.7 mi Spain 43°13′16″N 04°51′29″W / 43.22111°N 4.85806°W / 43.22111; -4.85806 (Sistema del Trave ) 17 Lukina-Trojama system 1431 [ 24] [ 25] 3.7 km 2.3 mi Croatia 44°46′01″N 15°01′35″E / 44.76694°N 15.02639°E / 44.76694; 15.02639 (Velebit caves ) 18 Egma Sinkhole 1429 [ 26] 3.1 km 1.9 mi [ 27] Turkey 36°18′54″N 32°46′44″E / 36.31500°N 32.77889°E / 36.31500; 32.77889 (Egma Sinkhole ) 19 Gouffre de la Pierre Saint-Martin 1410 [ 28] 88.1 km 54.7 mi. France , Spain 42°58′05″N 0°46′10″W / 42.96806°N 0.76944°W / 42.96806; -0.76944 (Gouffre de La Pierre Saint-Martin ) 20 Kuzgun Cave [ ru ] 1400 [ 29] 3.1 km 1.9 mi Turkey 37°50′13.50″N 35°17′12.31″E / 37.8370833°N 35.2867528°E / 37.8370833; 35.2867528 (Kuzgun Cave ) 21 Hochscharten-Höhlensystem 1394 [ 10] [ 30] 14.6 km 9.1 mi Austria 47°35′10.8″N 13°05′40.1″E / 47.586333°N 13.094472°E / 47.586333; 13.094472 (Hochschartehöhlensystem ) 22 Črnelsko brezno [ sl ] 1393 [ 23] [ 31] 20.0 km 12.4 mi [ 23] Slovenia 46°22′25.8″N 13°30′56.5″E / 46.373833°N 13.515694°E / 46.373833; 13.515694 (Črnelsko brezno sistem ) 23 Abisso Paolo Roversi 1360 [ 32] [ 33] 4.2 km 2.6 mi Italy 44°06′43.5″N 10°13′32.9″E / 44.112083°N 10.225806°E / 44.112083; 10.225806 (Abisso Paolo Roversi ) 24 Sistema Arañonera-Tendenera 1349 [ 15] [ 34] [ 35] 46.3 km 28.8 mi Spain 42°40′45.8″N 0°08′33.4″W / 42.679389°N 0.142611°W / 42.679389; -0.142611 (Sistema Arañonera-Tendenera ) 25 Sima del Sabbat (B112) 1346 [ 15] [ 36] [ 37] 6.7 km 4.2 mi Spain 42°30′59.1″N 0°18′27.8″E / 42.516417°N 0.307722°E / 42.516417; 0.307722 (Sima del Sabbat (B112) ) 26 BU 56 [ fr ] 1340 [ 38] 38.9 km 24.2 mi Spain 42°55′37.4″N 0°45′28.1″W / 42.927056°N 0.757806°W / 42.927056; -0.757806 (BU 56 ) 27 Siebenhengste-Hohgant-Höhle 1340 [ 39] [ 40] 164.5 km 102.2 mi Switzerland 46°47′1.76″N 7°54′4.43″E / 46.7838222°N 7.9012306°E / 46.7838222; 7.9012306 (Siebenhengste-Hohgant-Höhle ) 28 Nedam [ hr ] 1335 [ 41] [ 42] 3.3 km 2.1 mi Croatia 44°45′41.4″N 15°01′56.0″E / 44.761500°N 15.032222°E / 44.761500; 15.032222 (Nedam jama ) 29 Slovačka jama [ hr ] 1324 [ 43] [ 25] 6.4 km 4.0 mi Croatia 44°44′53″N 15°00′16″E / 44.74806°N 15.00444°E / 44.74806; 15.00444 (Slovačka jama ) 30 Renetovo brezno [ sl ] 1322 [ 23] 13.3 km 8.3 mi [ 23] Slovenia 46°21′18.9″N 13°26′42.4″E / 46.355250°N 13.445111°E / 46.355250; 13.445111 (Renetovo brezno ) 31 Mala Boka 1319 [ 23] [ 44] [ 45] 11.9 km 7.4 mi [ 23] Slovenia 46°19′16.6″N 13°29′28.6″E / 46.321278°N 13.491278°E / 46.321278; 13.491278 (Mala Boka - Polska Jama (BC4) System ) 32 Complesso del Releccio Alfredo Bini [ it ] 1313 [ 46] 25.3 km 15.7 mi Italy 45°57′27.6″N 9°22′52.8″E / 45.957667°N 9.381333°E / 45.957667; 9.381333 (Complesso del Releccio Alfredo Bini ) 33 Jojar Cave 1300 [ 47] 2.2 km 1.4 mi Iran 34°25′31.2″N 47°16′51.6″E / 34.425333°N 47.281000°E / 34.425333; 47.281000 (Jojar Cave ) 34 Cosanostraloch - Berger - Platteneck Höhlensystem [ de ] 1291 [ 16] [ 48] 30.3 km 18.8 mi Austria 47°33′27″N 13°13′16″E / 47.55750°N 13.22111°E / 47.55750; 13.22111 (Cosanostraloch - Berger - Platteneck Höhlensystem ) 35 Iljuhinskaja 1286 [ 49] [ 50] 8.9 km 5.5 mi Abkhazia / Georgia 43°25′53″N 40°21′10″E / 43.43146°N 40.35288°E / 43.43146; 40.35288 (Vladimir V. Iljukhina System ) 36 Višnevskij cave 1283 [ 51] [ 52] 8.5 km 5.3 mi [ 51] Uzbekistan 38°22′27″N 67°31′58″E / 38.37417°N 67.53278°E / 38.37417; 67.53278 (Višnevskij cave ) 37 Cueva Charco 1278 [ 53] [ 54] 6.7 km 4.2 mi [ 18] Mexico 17°56′12″N 96°46′25.8″W / 17.93667°N 96.773833°W / 17.93667; -96.773833 (Cueva Charco ) 38 Morca Cave 1276 [ 55] [ 56] 5.7 km 3.5 mi [ 57] Turkey 36°18′33.7″N 32°39′37.4″E / 36.309361°N 32.660389°E / 36.309361; 32.660389 (Morca Cave ) 39 Gouffre Berger 1271 [ 58] 45.0 km 28.0 mi France 45°13′09″N 5°36′17.2″E / 45.21917°N 5.604778°E / 45.21917; 5.604778 (Gouffre Berger ) 40 Sistema del (Pozu) Xitu - Cueva de Culiembro [ es ] 1264 [ 15] [ 59] 10.7 km 6.6 mi Spain 43°14′25.8″N 4°55′36.9″W / 43.240500°N 4.926917°W / 43.240500; -4.926917 (Sistema del Jitu ) 41 Moskovskaja 1260 [ 1] 2.5 km 1.6 mi Abkhazia / Georgia 43°26′30″N 40°22′56.7″E / 43.44167°N 40.382417°E / 43.44167; 40.382417 (Moskovskaja ) 42 Réseau du Casoar 1258 [ 60] [ 61] 17.3 km 10.7 mi Papua New Guinea 5°28′53″S 151°20′46″E / 5.48139°S 151.34611°E / -5.48139; 151.34611 (Réseau du Casoar ) 43 Torca dos los Rebecos 1255 [ 15] [ 62] 2.2 km 1.4 mi Spain 43°13′01.8″N 4°51′28.7″W / 43.217167°N 4.857972°W / 43.217167; -4.857972 (Torca dos los Rebecos ) 44 Pozo del Madejuno 1252 [ 15] [ 63] 2.8 km 1.7 mi Spain 43°10′05.4″N 4°50′40.5″W / 43.168167°N 4.844583°W / 43.168167; -4.844583 (Pozo del Madejuno ) 45 Sistema J2 1229 [ 64] [ 65] 14.8 km 9.2 mi Mexico 17°54′13.75″N 96°45′46.76″W / 17.9038194°N 96.7629889°W / 17.9038194; -96.7629889