Stefánshellir ♦
Location: Iceland, West, Borgarfjörður district, Hallmundarhraun lava field
Unmarked non-technical lava tube cave with multiple entrances and side passages including a great ice chamber
Surtshellir
Iceland, West, Borgarfjörður district, Hallmundarhraun lava field
Unmarked lava tube cave which was once home to a band of outlaws
Víðgelmir
Location: Iceland, West, Borgarfjörður district, Hallmundarhraun lava field
Iceland’s largest cave; the front portion has been converted for easy viewing and access by tour groups, but you can reserve an extended tour to the wild portions of the cave
Emesine Cave
Location: Hawaii, Big Island, Hilo area
Unmarked, rarely visited pristine lava tube