The Hyakumangan no Iwa Rock is a huge sandstone boulder belonging to the Tetori Group - a unit of rock from a shallow marine environment in the Jurassic to Cretaceous period (201 to 66 million years ago). It is believed to have been washed down from the Miyatani River during a big flood in 1934.
This is a prefecturally-designated national monument and selected as one of the 100 best geological examples. It is about 16 meters high and 52 meters around and weighs approximately 4,800 tons. Why don’t you try picking it up?
A small parking space is available for visitors.
Free App for Travelling Around Geoparks
Travel around Geoparks with ease with the Geoparks Japan App - a free map app that uses your phone or tablet's GPS function to show your location on a map, and includes information about nearby sites and tourist destinations. The Hakusan Tedorigawa Geopark offers three maps for walking, driving, and hiking. More information here
Android: Google Play
iOS: Apple Store