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Yūgendō: The Oldest Limestone Cave in Japan

Yūgendō (幽玄洞) in Ichinoseki is said to be the oldest limestone cave in Japan. The cave was determined to be 50 meters below water 350 million years ago. Thus, in addition to stalagmites, fossils such as trilobites and crinoids can also be seen in the 500-meter-long cave. At the cave’s far end is the emerald-green […]

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