Mount Fuji
Standing as the tallest mountain in Japan, Mount Fuji has become a national icon. The first known ascent was by an unknown monk in 663. After that, the peak was regularly climbed by men, but women were not allowed on the summit until the Meiji Era in the late 19th century. Today, the mountain is a popular tourist site, with 200,00 people climbing the mountain every year.
It is still considered an active volcano and has erupted more than 15 times since 781. The last time it experienced an eruption however, was 1707 where it is reported that ash fell over Tokyo, 62 miles away. Given concerns of an eruption in the near future, Fuji is monitored 24 hours a day.