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Hakone-machi, Japan
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Attraction
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Japan, 〒250-0631 Kanagawa-ken, Ashigarashimo-gun, Hakone-machi, Sengokuhara 県道734号線
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N35° 14' 30.8976" E139° 1' 14.4012"
(35.241916, 139.020667)
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Ōwakudani (大涌谷, lit. "Great Boiling Valley") is a volcanic valley with active sulphur vents and hot springs in Hakone, Kanagawa Prefecture, Japan. It is a popular tourist site for its scenic views, volcanic activity, and especially, Kuro-tamago (黒卵, lit. "black egg") — a local specialty of eggs hard-boiled in the hot springs. The boiled eggs turn black and smell slightly sulphuric; consuming the eggs is said to increase longevity. Eating one is said to add seven years to your life.