Ryūsendō

Ryūsendō
龍泉洞
Entrance to Ryūsendō
LocationIwaizumi, Iwate Prefecture, Japan
Coordinates39°51′37.92″N 141°47′50.21″E / 39.8605333°N 141.7972806°E / 39.8605333; 141.7972806
Depth249 meters
Length3,631 meters
GeologyLimestone
AccessPublic
Show cave opened1967
Show cave length1,200 meters
Websitehttp://www.town.iwaizumi.iwate.jp/~ryusendo/

Ryūsendō (龍泉洞) is one of Japan's three largest limestone caverns. It is located in the town of Iwaizumi, Iwate Prefecture, in the Tōhoku region of northern Japan.