Archaeologists have made a sensational discovery beneath the Baltic Sea - a 3,000-foot-long stone wall that could upend our understanding of Europe's prehistoric past. Dubbed the Blinkerwall ...

The stone wall, which is 1.8 meters tall and 7 meters wide and runs east to west, is believed to have been a boundary that divided the central part of the castle and warriors’ residences.

The stone wall beside the Gov. Edward Dudley Mansion in Wilmington may date back to the 1700s. Deeds show that the wall was already standing by 1837 and was likely built to hold back the bluff.