Natsushima Shell Mound - Credit: Wikimedia Commons
The is an archaeological site in the Natsushima neighborhood of the city of Yokosuka, Kanagawa Prefecture, in the southern Kantō region of Japan containing a Jōmon period shell midden. It was designated a National Historic Site of Japan in 1972. It was then oldest known shell midden in Japan. Read more on Wikipedia
Source: en.wikipedia.org