Fuji, Japan
Mount Fuji's past eruptions and resulting lava flows have created multiple caves in the Fuji Five Lake region around the mountain's northern base. Today, three of these caves have been developed and opened to tourists to be explored.
Bat Cave
The Bat Cave, named after its former winter inhabitants, is the most extensive of the three caves. In total the cave is nearly 350 meters long and has multiple large chambers and diverging tunnels to be explored. Some of ...