# List of longest caves

This list of longest caves includes caves in which the combined length of documented passageways exceeds 100 kilometres (62 mi). In some of these caves, passageways are still being discovered.

## Geographical distribution

Caves are found around the world. The largest form in areas of karst landforms whose rocks dissolve easily. Preferable conditions for karst cave formation are adequate precipitation, enough plants and animals to produce ample carbon dioxide, and a landscape of gentle hills which drains slowly. The highest concentrations of long caves in the world are found in the Pennyroyal Plateau of southern Kentucky, United States, in the Black Hills of South Dakota, United States, and in the Yucatán Peninsula, Mexico.

## List

| # | System | Length | Location | coordinates | Discovery | Associated parks, protected areas |
| 1 | Mammoth Cave | 685.6 km (426.0 mi) | near Brownsville, Kentucky, United States | 37°11′15″N 86°06′13″W﻿ / ﻿37.18758°N 86.10357°W﻿ / 37.18758; -86.10357﻿ (Mammoth cave historic entrance) | 1791 | Mammoth Cave National Park, also a World Heritage Site, International Biosphere Reserve, and International Dark Sky Park |
| 2 | Sistema Ox Bel Ha | 524.1 km (325.7 mi) | near Tulum, Quintana Roo, Mexico | 20°09′37″N 87°29′15″W﻿ / ﻿20.16028°N 87.48750°W﻿ / 20.16028; -87.48750﻿ (Sistema Ox Bel Ha) | 1996 | southern parts in Sian Ka'an Biosphere Reserve |
| 3 | Shuanghedong Cave Network | 437.4 km (271.8 mi) | Guizhou, China | 28°14′31″N 107°16′34″E﻿ / ﻿28.24199°N 107.27608°E﻿ / 28.24199; 107.27608﻿ (Shuanghe Dongqun) | 1988 | Suiyang Shuanghedong National Geopark |
| 4 | Sistema Sac Actun / Sistema Dos Ojos | 386.1 km (239.9 mi) | near Tulum, Quintana Roo, Mexico | 20°14′48″N 87°27′51″W﻿ / ﻿20.246556°N 87.464111°W﻿ / 20.246556; -87.464111﻿ (Gran Cenote) | 1987 | {{{1}}} |
| 5 | Jewel Cave | 354.07 km (220.0 mi) | near Custer, South Dakota, United States | 43°43′46″N 103°49′46″W﻿ / ﻿43.72944°N 103.82944°W﻿ / 43.72944; -103.82944﻿ (Jewel Cave) | 1900 | Jewel Cave National Monument |
| 6 | Wind Cave | 266.8 km (165.8 mi) | near Hot Springs, South Dakota, United States | 43°33′29″N 103°28′46″W﻿ / ﻿43.55804°N 103.47955°W﻿ / 43.55804; -103.47955﻿ (Wind Cave) | 1881 | Wind Cave National Park |
| 7 | Optymistychna Cave | 264.5 km (164.4 mi) | near Korolivka, Ukraine | 48°44′20″N 25°59′22″E﻿ / ﻿48.738830378°N 25.989496042°E﻿ / 48.738830378; 25.989496042﻿ (Grotte Optimiste) | 1966 | Dnistrovskyy Canion |
| 8 | Clearwater Cave System | 258.5 km (160.6 mi) | near Miri, Sarawak, Malaysia | 4°03′55″N 114°49′54″E﻿ / ﻿4.06529°N 114.83176°E﻿ / 4.06529; 114.83176﻿ (Clearwater Cave) | 1978 | Gunung Mulu National Park, also a World Heritage Site |
| 9 | Lechuguilla Cave | 244.7 km (152.0 mi) | near Carlsbad, New Mexico, United States | 32°11′26″N 104°30′12″W﻿ / ﻿32.1906420°N 104.5033091°W﻿ / 32.1906420; -104.5033091﻿ (Grotte de Lechuguilla) | 1900 | Carlsbad Caverns National Park |
| 10 | Fisher Ridge Cave System | 215.9 km (134.2 mi) | near Brownsville, Kentucky, United States | 37°11′30″N 85°58′48″W﻿ / ﻿37.191736°N 85.980122°W﻿ / 37.191736; -85.980122 | 1981 | partly within Mammoth Cave National Park |
| 11 | Sistema del Alto Tejuelo | 212.2 km (131.9 mi) | Cantabria, Spain | 43°15′11″N 3°40′51″W﻿ / ﻿43.2530670°N 3.6807990°W﻿ / 43.2530670; -3.6807990 | 1965 | {{{1}}} |
| 12 | Hölloch | 212.1 km (131.8 mi) | Muotathal, Switzerland | 46°58′36″N 8°47′18″E﻿ / ﻿46.976670°N 8.788330°E﻿ / 46.976670; 8.788330 | 1875 | {{{1}}} |
| 13 | Siebenhengste-Hohgant-Höhle | 164.5 km (102.2 mi) | Switzerland | 46°47′02″N 7°54′04″E﻿ / ﻿46.783822°N 7.901231°E﻿ / 46.783822; 7.901231 | 1966 | {{{1}}} |
| 14 | Schönberg Cave System | 156.9 km (97.49 mi) | Austria | 47°42′06″N 13°46′20″E﻿ / ﻿47.701528°N 13.772333°E﻿ / 47.701528; 13.772333 | 1976 | {{{1}}} |
| 15 | Mortillano system | 146.5 km (91.03 mi) | Cantabria, Spain | 43°13′51″N 3°33′43″W﻿ / ﻿43.23082°N 3.56197°W﻿ / 43.23082; -3.56197 | 1960 | {{{1}}} |
| 16 | Priest's Grotto | 142.1 km (88.30 mi) | Ukraine | 48°45′52″N 25°57′57″E﻿ / ﻿48.7644444°N 25.9658330555°E﻿ / 48.7644444; 25.9658330555 | 1940 | {{{1}}} |
| 17 | Steinbrücken Cave | 137.7 km (85.56 mi) | Austria | 47°39′43″N 13°48′11″E﻿ / ﻿47.661940°N 13.803060°E﻿ / 47.661940; 13.803060 | 1929 | {{{1}}} |
| 18 | Marosakabe cave system | 124 km (77.05 mi) | Madagascar | 16°27′07″S 45°20′08″E﻿ / ﻿16.45189°S 45.33543°E﻿ / -16.45189; 45.33543﻿ (Zohy Tsongom'omby) | 2006 | Tsingy de Namoroka Strict Nature Reserve |
| 19 | Bullita Cave | 123 km (76.43 mi) | Australia | 16°03′48″S 130°23′00″E﻿ / ﻿16.063330°S 130.383330°E﻿ / -16.063330; 130.383330 | 1990 | Gregory National Park |
| 20 | Sistema del Gandara | 119.0 km (73.94 mi) | Cantabria, Spain | 43°11′34″N 3°34′46″W﻿ / ﻿43.1927260°N 3.5794850°W﻿ / 43.1927260; -3.5794850 | 2005 | {{{1}}} |
| 21 | Hirlatzhöhle | 117.8 km (73.20 mi) | Austria | 47°32′42″N 13°37′51″E﻿ / ﻿47.544975°N 13.630953°E﻿ / 47.544975; 13.630953 | 1949 | {{{1}}} |
| 22 | Réseau Félix Trombe | 117.2 km (72.82 mi) | France | 42°58′21″N 0°51′59″E﻿ / ﻿42.972500°N 0.866390°E﻿ / 42.972500; 0.866390 | 1908 | {{{1}}} |
| 23 | Toca da Boa Vista | 114 km (70.84 mi) | Brazil | 10°09′45″S 40°51′35″W﻿ / ﻿10.162500°S 40.859722°W﻿ / -10.162500; -40.859722﻿ (Toca da Boa Vista) | 1987 | {{{1}}} |
| 24 | Helms Deep Cave | 112.8 km (70.09 mi) | Perry County, Tennessee, United States | | 1970 | {{{1}}} |
| 25 | Ojo Guareña | 111 km (68.97 mi) | Spain | 43°02′02″N 3°37′50″W﻿ / ﻿43.03376°N 3.63059°W﻿ / 43.03376; -3.63059 | 1956 | {{{1}}} |
| 26 | Sistema K'oox Baal | 103.8 km (64.50 mi) | near Tulum, Quintana Roo, Mexico | 20°22′21″N 87°25′02″W﻿ / ﻿20.372622°N 87.417239°W﻿ / 20.372622; -87.417239﻿ (K'oox Baal) | 1987 | {{{1}}} |
| 27 | Sistema Purificacion | 101.4 km (63.01 mi) | Mexico | 24°04′03.30″N 99°33′54.93″W﻿ / ﻿24.0675833°N 99.5652583°W﻿ / 24.0675833; -99.5652583﻿ (Sistema Purification) | 1970 | {{{1}}} |
| 28 | Sistema Huautla | 100.2 km (62.26 mi) | 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) | 1965 | {{{1}}} |
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