Hachimanbayashi Kanga ruins - Credit: Wikimedia Commons
The is an archaeological site containing of the ruins of an Asuka period jōsaku-style Japanese castle located in what is now the Shimazaki neighborhood of the city of Nagaoka, Niigata in the Hokuriku region of Japan. The site was designated a National Historic Site of Japan in 1995. Read more on Wikipedia
Source: en.wikipedia.org