@user4039590716226: Japan's Most Perfect Volcano volcano - This xlinct volcano in Japan looks almost loo errect to be natural Mount Omuro rises nearly 1,900 feet above the izu Peninsula in Shizuoka Prefecture. Formed over 4,000 years ago, its perfectly round, bowl-shaped crater makes it one of Japan's most fascinating natural landmarks and a silent witness to ancient volcanic history #History #AncientMystery #Archaeology #HiddenPlaces