East Bay Walls
East Bay Walls, Mystery walls in California
The East Bay Walls, also known as the Berkeley Mystery Walls, are a series of stone walls on a hillside.
Their origins and age are unknown, with speculations ranging from pre-Columbian times to the Spanish colonial period.
The walls are a subject of local folklore, suggesting ancient Native American or even extraterrestrial construction.
Visitors can explore segments of the wall, although many parts are on private property.
The walls' purpose remains a mystery; they do not enclose space nor appear defensive.
Source: Wikimedia