Ice cave formed by ancient 🌋 eruption

#bucketlistreboot 📍Located in the heart of the Aokigahara Forest at the base of Mt. Fuji, Narusawa Ice Cave is a frozen subterranean realm formed when nearby Mt. Nagao erupted. Pillars of ice, backlighting and a natural skylight give this grotto a fantastic aspect. 🌋 The ice cave was created after Mt. Nagao, which formed Mt. Fuji's northwestern flank, erupted violently in 864. Lava hollowed out a vast underground cave. Temperatures drop steadily as you make your way down the stairs and through low, dark tunnels. 🧊 The ice pillars that form here grow bigger in the winter, and sometimes the stalactites and stalagmites actually connect. The cave's temperature hovers around zero degrees Celsius year-round, and it was once used to store seeds and silkworm cocoons.