Prehistoric Cedar Trees
Step back 4,000 years at the Sanbe Jomon Forest Museum in Shimane Prefecture, where a prehistoric forest lies preserved beneath your feet. Buried by a volcanic eruption from Mt. Sanbe during the Jomon period, towering cedar trees—some over 10 meters tall—still stand upright with their roots intact, offering a rare glimpse into ancient Japan's natural history. This underground exhibition is one of the few places in the world where such a forest is displayed in situ, earning it designation as a National Natural Monument. Visitors can explore the subterranean dome, marvel at the massive tree trunks, and learn about the geological forces that preserved this ancient woodland. Located in Oda City, it's a must-visit for history buffs and nature enthusiasts alike.