Ryusendo

Ryusendo is one in every of Japan's 3 largest limestone caverns. It located inside the city of Iwaizumi, Iwate Prefecture, within the Tohoku place of northern Japan. Ryusendo has an reachable period of 1200 meters, making it the 62nd longest in Japan; however, its intensity of 249 metres 817 ft from the entrance to its lowest factor is the 5th deepest in Japan. The overall confirmed duration of the cave is presently 3,631 metres 11,913 feet, although the cave may additionally increase an awful lot similarly.

Further exploration has been banned following a fatality in December 1968. The cave machine consists of at least four underground lakes, the 1/3 of which has a depth of 98 metres 322 feet, and the fourth of which now not available to the general public has a depth of over 120 metres 390 toes. The cave device is also domestic to colonies of Greater horseshoe bat, Eastern long-fingered bat, Brown long-eared bat and Hilgendorf's tube-nosed bat as well as Microbats.

Ryusendo became designed a Natural monument via the Japanese authorities in 1934. The caves had been opened to the general public in 1967. Its underground lake gadget become specified one of the “one hundred Famous Springs of Japan” in 1985 by the Ministry of the Environment.