Mount Aso is the largest active volcano in Japan. Located on the southern island of Kyushu, it has one of the largest calderas of any volcano on Earth, stretching for about 75 miles in overall circumference. The Mount Aso Ropeway, built in the 1950s, travels to the rim of the volcano. The cars are quite large, able to carry up to 91 people. The 3,000-foot journey takes only about four minutes. Occasionally, the volcano becomes active and service on the Ropeway is suspended for safety reasons.