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