The Ishi no Hōden (石の宝殿) is a megalithic monument located in the grounds of the Ōshiko Jinja, a Shinto shrine located in the city of Takasago, Hyōgo Prefecture in the Kansai region of Japan. Of unknown age, it was designated a National Historic Site of Japan in 1979 collectively with the nearby Tatsuyama Stone Quarries, which dates from the Kofun period. It is also called the Ame no Ukiishi. [Via: wikipedia]