Tsukinoki Shell Midden - Credit: Wikimedia Commons
The is an archaeological site in the Ninomachi neighborhood of Chūō ward of the city of Chiba, Chiba Prefecture, in the Kantō region of Japan containing a Jōmon period shell midden and settlement ruin. The site was designated a National Historic Site of Japan in 1978, with the area under protection extended in 2002 and again in 2006 Read more on Wikipedia
Source: en.wikipedia.org