The old mining site of Utsunomiya’s famous，Oya Stone，has now been turned into a historical museum. The exhibition features the long history of the mining since the 17th century，with many materials on display. The underground cavern，covering 20,000 sq. metres，is large enough to fit a baseball field.
With a fantastic atmosphere reminding visitors of the ruins of Ancient Rome.It is used in various scenes such as movie shooting, music videos shooting, weddings, concert, etc. due to its mysterious scenery.