Narusawa Ice Cave: The lava tube brimming with 10-foot-high ice pillars at the base of Mount Fuji
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Narusawa Ice Cave: The lava tube brimming with 10-foot-high ice pillars at the base of Mount Fuji

The Narusawa Ice Cave is a natural lava tunnel that formed during a violent eruption of Mount Fuji in A.D. 864. Every winter, the cave grows giant ice pillars due to its freezing temperatures.