One of Japan’s World Heritage sites, Mount Fuji is actually an active volcano. While it repeatedly has smallscale eruptions, those of the large scale have occurred most recently in 864 and 1707. Some volcanologists say this symbol of Japan may erupt sometime soon. So, if you’re planning to climb the 12,388-foot mountain this summer, you better sleep on it and maybe try to avoid the day it erupts.

related stories

• Did you know?: Popular Japanese family names
• Did you know?: The three views of Japan
• Did you know?: Rainy season in Japan