A lava tube, or pyroduct, is a natural conduit formed by flowing lava from a volcanic vent that moves beneath the hardened surface of a lava flow. If lava in the tube empties, it will leave a cave.
Africa
Democratic Republic of the Congo Unnamed cave along the Kakomeru climbing route of Mt. Nyamulagira
Ethiopia 70 m lava tube cave has been recorded southeast of Addis Ababa and a smaller example on K'one Volcano
Kenya Chyulu Hills – contains nearly 100 tubes Elmenteita Badlands north of Mt. Eburru – several small caves Leviathan Cave – At 12.5 kilometres, it is the longest lava tube in Africa. Emuruangogolak Volcano caves North Chyulu hills area – 20 caves are known Hells Teeth Kimakia Caves Mathioni Skull Caves Kimakia Cave Lake Tillam, near Korosi Volcano – several known lava tubes Mount Suswa – around 40 known caves totaling around 11 km Menengai Caldera – single vent-like cave Nyambeni Mountains near Maua – 2 known caves
Rwanda Musanze System – total 5.1 km Ubuvomo bwa Musanze – 4.56 km Ubuvomo bwa Nyrabadogo – 1.5 km
Tanzania Mount Kilimanjaro Mawenzi lava tube system (at least 5)
Uganda Garama Cave – Kigesi District, is 342 m long
Asia
China Wudalianchi National Park and Global Geopark Laoheishan volcano Fairy Palace Cave Waterfall Palace Cave East Jiaodebushan volcano Ice Cave Underground Ice River Jingpo Hu National Park and Global Geopark Weihuting Cave Longyandongtian Cave (Dragon Rock Cave) Shenshui Cave (Driven Water Cave) Gubingdong Cave (Ancient Ice Cave) Jiemei Cave (Sisters Cave) Kanlianmiying Cave (Anti-J Allied Army Secret Camp) Leiqiong Global Geopark – More than 30 tubes Seventy Two Cave Lava Tunnel
Japan Fugaku Wind Cave Lake Sai Bat Cave Narusawa Ice Cave
Saudi Arabia Harrat Khaybar lava field – Umm Jirsan lava tube – 1.5 km long (Pint 2009)
South Korea Geomunoreum Lava Tube System Gimnyeonggul Manjanggul – more than 8 kilometers long, located in Jeju Island, is a popular tourism spot.
Europe
Iceland Búri (cave) Raufarhólshellir Surtshellir – For a long time, this was the longest known lava tube in the world. Víðgelmir
Italy Grotta del Gelo on Mount Etna Grotta dei Tre Livelli – lava tube system on three levels at Mount Etna
Portugal Azores Algar do Carvão Furna de Água Furnas do Cavalum Galerias da Feteira Gruta Brisa Azul Gruta das Agulhas Gruta das Cinco Ribeiras Gruta das Mercês Gruta das Torres Gruta do Carvão Gruta do Natal Gruta do Zé Grande São Vicente Caves
Spain Canary Islands Cuevas de los Murciélagos Cueva de los Verdes Cueva del Viento Jameos del Agua Tunnel de la Atlantida Cueva de los Verdes
North America
Canada Nisga'a Memorial Lava Bed Provincial Park
United States Ape Cave – Washington (state) Bandera Volcano Ice Cave – New Mexico Cheese Cave – Washington (state) Indian Tunnel lava tube (and more than 250 other examples) in Craters of the Moon National Monument and Preserve, Idaho Derrick Cave – Oregon El Malpais National Monument, in western New Mexico Hālona Blowhole Kaumana Cave – Hawaii Kazumura Cave, Hawaii – Not only the world's most extensive lava tube, but at 65.5 kilometres (40.7 mi), it has the greatest linear extent of any cave known. Kuna Caves – Idaho Lava Beds National Monument – California Newberry National Volcanic Monument – Oregon Arnold Lava Tube System Boyd Cave – Oregon Horse Lava Tube System Redmond Caves Lava River Cave Lava Top Butte basalt Skeleton Cave Lava River Cave – Arizona Mammoth Cave – Utah Niter Ice Cave – Idaho Pluto's Cave – California Skylight Cave – Oregon Snow Canyon State Park - Utah Subway Cave Lava Tubes – Lassen National Forest, California Wilson Butte Cave – Idaho
Oceania
Australia Undara Volcanic National Park – Queensland
Galapagos Bellavista lava tunnel
New Zealand Auckland volcanic field Includes more than 50 lava tubes Wiri Lava Cave
Samoa Alofaaga Blowholes
Extra Terrestrial Lunar lava tube Martian lava tube
References