Damariscotta Shell Midden Historic District
The Damariscotta Shell Midden Historic District encompasses a significant collection of shell middens along the Damariscotta River in Lincoln County, Maine. It includes eleven middens in all, including the well-known Whaleback Shell Midden and the Glidden Midden, which is the largest shell midden in the northeastern United States.
Source: Wikipedia — Damariscotta Shell Midden Historic District (CC BY-SA 4.0)