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The Underground Geyser Center is a recently built facility found in Youkai Mountain. The kappa conduct a variety of experiments and research projects in the area. Utsuho Reiuji can be found here supervising research on nuclear energy.
The inspiration is the Suwa Lake Geyser Center (Suwako Kanketsusen Sentā, 諏訪湖間欠泉センター), where the geyser is observed spouted the most highly in Japan, and where is also famous for the tourist site as one of the facilities of spa.


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An entranceway to the Underground Geyser Center as seen in Touhou Hisoutensoku

Toho hisotensoku-passage of underground geyser centerd4

A passageway within the Underground Geyser Center as seen in Touhou Hisoutensoku

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The Reactor Core of the Underground Geyser Center as seen in Touhou Hisoutensoku

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