Northern Lao - European
Cave Project   

  Longest Caves in Northern Laos (>1000m)

No. Cave name District Village Length (m) Explored
1 Tham Chom Ong Oudomxay Ban Chom Ong 17150 2009/2010/2011
2 Tham Na Thong Namor Ban Na Thong 5010 2010
3 Tham Nam Long Xam Neua Ban Napoung 4981 2007/2008
4 Tham Nam Lot Keo Sayabouli 3560 2011
5 Tham Nam Eng (resurgence cave) Vieng Poukha Ban Nam Eng 3460 2005
6 Tham Nam Eng (fossile cave) Vieng Poukha Ban Nam Eng 3120 2005
7 Tham Nam  Xam Neua Ban Napoung 3064 2007/2008
8 Tham Seua / Tham Nam Lot Muang Phou Khoun Muang Phou Khoun 2650 2005
9 Tham Pasat System Vieng Poukha Ban Tha Louang 2332 2005/2006
10 Tham Doun Mai Muang Ngoy Muang Ngoy 2090 2012
11 Tham Pha Khoun Houay Nathang Sayabouli 1922 2011
12 Tham Phafah Keo Sayabouli 1844 2011
13 Tham Loum Xiang Ngeun Ban Long Khoay 1598 2003
14 Tham Ma Liong Vieng Xai Vieng Xai 1565 2008
15 Tham Pageo Muang Ngoy Muang Ngoy 1550 2000
16 Tham Mokfek Namor Ban Na Thua 1550 2010
17 Tham Gnai Muang Nan Ban Hoikong 1433 2000
18 Tham Thia Thong Vieng Thong Ban Nam Ngeun 1360 2007/2009
19 Tham Nam Khao Hou Vieng Xai Khan Muang 1155 2012
20 Tham Dout Phou Khoun Ban Long Mieng 1128 2007
21 Tham Kokai Xop Ban Xop Tai 1125 2009